calcium nitrate zinc bromide ** g. Fe2S3 ** h. FeS. When magnesium reacts with oxygen to form magnesium oxide, for example, the magnesium atom loses two electrons in order to form the Mg2 cation, which has an electronic configuration of 2,8. Aqueous solution of magnesium sulfate is going to be slightly acidic, and there is no need to even go to the lab to test it. Answer = SCl6 is Polar What is polarand non-polar? 100% (7 ratings) SOLUTION OF YOUR QUESTION . Is it true that Perry Mason once kissed Della Street? You can use parenthesis () or brackets []. Mg (NO 3) 2 + 2 RbI = MgI 2 + 2 Rb (NO 3) See Steps to Balance Mg (NO3)2 + RbI = MgI2 + Rb (NO3) Solubility Equation mgi2 ionic or molecular. H2O = Polar Covalent VIII. Polyatomic ions. Magnesium iodide (MgI2) | MgI2 - PubChem Apologies, we are having some trouble retrieving data from our servers. The concentration of the additive in the electrolyte was . Similarly, NaF is basic (it is the salt of a strong base, NaOH, and a weak acid, HF). The simplest explanation is that MgI2 is ionic, because Mg is an alkali metal, which reacts by losing electrons, and I is a halogen, which reacts by gaining them. 2. Each of these reactions produces a white solid and an orange flame. For example, MgI2 has a electronegativity difference of 1.3 (which is smaller than 1.67, the rule to be a covalent bond). Magnesium is essential for good health. The density of its various forms is: 4.43 g/cm3 as an anhydrous solid, 2.353 g/cm3 as a hexahydrate solid, and 2.098 g/cm3 as an octahydrate solid. Sodium iodide has a Na (+) counterion and is a metal iodide salt. Write the balanced net ionic equation for the following reaction and determine the conjugate acid-base pairs. The decreasing order of ionic character NaF>NaCl>NaBr>NaI. Misconception Alert Some students like to use the criss-cross method. Compound states [like (s) (aq) or (g)] are not required. The balanced equation will appear above. A potassium atom transfers an electron to an iodine atom in the same way that a potassium ion and an iodide ion form a potassium ion. xH2O. (a) binary molecular compound; (b) ternary ionic compound; (c) binary ionic compound; (d) ternary oxyacid; (e) binary acid. 5. Write it by breaking all the soluble ionic compounds into their respective ions. The balanced equation will be calculated along with the solubility states, complete ionic equation, net ionic equation, spectator ions and precipitates. Answer: magnesium iodide ( MgI2 ) is ionic bond What is chemical bond, ionic bond, covalent bond? Na3PO4 + MgI2 = NaI + Mg3 (PO4)2 Net Ionic Equation Na3PO4 + MgI2 = NaI + Mg3 (PO4)2 Net Ionic Equation Net Ionic Equation Overall Chemical Equation Ensure that the elements on both sides of the molecular equation are balanced by using the online chemical equation balancer. THEN WRITE ITS FORMULA OR GIVE ITS NAME. When described as an acid, the correct name of H2S is: hydrosulfuric acid. If you mean which has the most ionic character, the answer is whichever pair exhibits the most difference in electronegativity between the two atoms. Properties of molecular compounds . Remember, with resonance oprating, all the oxygen atoms are chemically indistinguishable in solution and gas phase. You can override the automatically calculated compound states below. Sodium chloride is an ionic compound. Practice: Naming ionic compounds. If you have. Common polyatomic ions. Most service stations will accept oil as long as it, He was 76. Examples: Fe, Au, Co, Br, C, O, N, F. Replace immutable groups in compounds to avoid ambiguity. ! Heteronuclear atoms with an electronegativity difference: I'm pretty sure determining this revolves around electronegativity. Forming Covalent Character has more to do with Polarizability which relates to atomic and Ionic radius. Ionic bonds are formed when an electron moves from one atom to another, and covalent bonds are formed when two different atoms share one or more pair of electrons. When we. Covalent Character has more to do with Polarizability which relates to atomic and Ionic radius. These electron pairs are known as shared pairs or bonding pairs, and the stable balance of attractive and repulsive forces between atoms, when they share electrons, is known as covalent bonding. order now. NAMING BINARY MOLECULAR COMPOUNDS . Now lets look at lye, a strong base with the chemical formula NaOH (sodium hydroxide). (1 single bond and 3 double bonds with chlorine in its +7 oxidation state). What is the molecular, ionic, and net ionic equations for Copper(II) sulfate + sodium phosphate? (NH4)3PO4 + ZnSO4 = Zn3(PO4)2 + (NH4)2SO4. Is CrO2 an ionic or covalent bond? There are, however, two complicating factors: I. HI + Mg = MgI2 + H Net Ionic Equation Net Ionic Equation Overall Chemical Equation Ensure that the elements on both sides of the molecular equation are balanced by using the online chemical equation balancer. Melting Point of Magnesium Chloride. Magnesium oxide is a simple basic oxide, because it contains oxide ions. Answer = C2H6O is Polar What is polarand non-polar? It can be found by removing ions that occur on both the reactant and product side of the . For example, molecular oxygen (O2) is nonpolar because the electrons will be equally distributed between the two oxygen atoms. These salts are typical ionic halides, being highly soluble in water. Naming Compounds Practice Worksheet. What is the name of the binary acid . Usage of magnesium iodide in the Baylis-Hillman reaction tends to give (Z)-vinyl compounds. Chemical bond A chemical bond is a lasting attraction between atoms, ions or molecules that enables the formation of chemical compounds. Overall Chemical Equation Ensure that the elements on both sides of the molecular equation are balanced by using the online chemical equation balancer. . For example, C6H5C2H5 + O2 = C6H5OH + CO2 + H2O will not be balanced, but XC2H5 + O2 = XOH + CO2 + H2O will. ?) It is freely soluble in water, more rapidly soluble in boiling water, and practically insoluble in alcohol. The simplest explanation is that MgI2 is ionic, because Mg is an alkali metal, which reacts by losing electrons, and I is a halogen, which reacts by gaining them. Copy this to my account; E-mail to a friend; Find other activities; Start over; Help; Write formulas for mixed ionic and covalent compounds. Thus NaF is more ionic. Question = Is C2H6Opolar or nonpolar ? Is TiO2 a ionic or covalent bond? Similarly, CaF 2 would dissociate into one Ca2+ and two F ions. MgI2 = ionic Step-by-step explanation Ionic compounds are generally formed by reaction between metals and non metals. So when determining if a molecule is ionic or covalent, it is not always/only dependent on the electronegativity difference? Thus the molecular ion peak in both A and B is 88. . Using the periodic table, predict whether the following chlorides are ionic or covalent: KCl, NCl3, ICl, MgCl2, PCl5 256 Consultants. Metallic bonds are best described as a sea of electrons. ), Administrative Questions and Class Announcements, *Making Buffers & Calculating Buffer pH (Henderson-Hasselbalch Equation), *Biological Importance of Buffer Solutions, Equilibrium Constants & Calculating Concentrations, Non-Equilibrium Conditions & The Reaction Quotient, Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions, Reaction Enthalpies (e.g., Using Hesss Law, Bond Enthalpies, Standard Enthalpies of Formation), Heat Capacities, Calorimeters & Calorimetry Calculations, Thermodynamic Systems (Open, Closed, Isolated), Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric), Concepts & Calculations Using First Law of Thermodynamics, Concepts & Calculations Using Second Law of Thermodynamics, Third Law of Thermodynamics (For a Unique Ground State (W=1): S -> 0 as T -> 0) and Calculations Using Boltzmann Equation for Entropy, Entropy Changes Due to Changes in Volume and Temperature, Calculating Standard Reaction Entropies (e.g. Some people may find it easier to take supplements first thing in the morning, while others may find it easier to take them with dinner or just before bed. Answer = C2Cl2 is Polar What is polarand non-polar? What is the reasoning for this? CCl 4 = Nonpola. mgi2 ionic or molecular. I think you have done that. Click to see full answer Also, electronegativities are 1.2 . The bond between the magnesium ion and the perclorate ion is Ionic Bond whereas the bond between chlorine and oxygen is covalent bond. Metallic bonds are best described as a sea of electrons. sodium carbonate decahydrate dinitrogen tetroxide silver (I) acetate cesium sulfide dinitrogen tetroxide hydroiodic acid . Directions: Write balanced molecular, ionic, and net ionic equations for each of the following reactions. Take the next atom in the molecule and replace its ending with an "ide" suffix. How do you distinguish a binary molecular compound from a binary acid? If you're electronegativity differences are between 1.7 and 0.5 then it's a polar . Is CrO2 an ionic or covalent bond? Magnesium fluoride is an inorganic compound with the formula Mg F 2. I love to write and share science related Stuff Here on my Website. carbonic acid. Molecular compounds form covalant bond between atoms. Use uppercase for the first character in the element and lowercase for the second character. MgSO4 is a salt formed by a weak base and a strong acid (both dibasic), so there is a two-step hydrolysis of magnesium cation. This reaction results in a neutral salt. Practice Exercise. Molecular Equation: 2NaCl(aq) + Pb(NO3)2(aq) ( PbCl2(s) + 2NaNO3(aq) Complete Ionic Equation: Molar mass of MgI2 = 278.11394 g/mol. You can override the automatically calculated compound states below. mgi2 ionic or molecular You can use parenthesis () or brackets []. This difference results in an electron(s) being transferred from the metal (lower electronegativity) to the non-metal (higher electronegativity). Question: Is B2 2-a Paramagnetic or Diamagnetic ? Mg (NO 3) 2 + 2 KI = MgI 2 + 2 KNO 3 See Steps to Balance Mg (NO3)2 + KI = MgI2 + KNO3 Solubility Equation Science; Chemistry; Chemistry questions and answers; 3- Determine whether each compound is ionic or covalent and write the appropriate Lewis structure (4 pts) a- HCN b- CIF c- Mgl2 d- Cas 4- Determine the molecular geometry of each of the following molecules: a- CBr4 b- H2CO c- CS2 d- BH3 e- NO3 (5 pts.) You can use parenthesis () or brackets []. DETERMINE WHETHER EACH SUBSTANCE BELOW IS IONIC, MOLECULAR OR AN ACID. 2 K (s) + Mg 2+ (aq) + 2 I-(aq) = 2 K + (aq) + 2 I-(aq) + Mg (s) Net Ionic Equation The balanced net ionic equation includes only species that are involved in the reaction. Transcribed image text: Classify each compound as ionic or molecular. https://en.wikipedia.org/wiki/Covalent_bond. A compound that consists of hydrogen and one other non-metallic element is known as: a binary acid. Here is what you do. Magnesium sulfate is an ionic compound as there is a bond between a metal and a non-metal. PUGVIEW FETCH ERROR: 403 Forbidden National Center for Biotechnology Information 8600 Rockville Pike, Bethesda, MD, 20894 USA Contact Policies FOIA HHS Vulnerability Disclosure National Library of Medicine National Institutes of Health The results in the metal becoming a postitive ion and the non-metal a negative ion. Magnesium Nitrate is a water-soluble crystalline magnesium source for use with nitrates and pH levels that are lower (acidic). Its a nonmetal, which means its not metal. . A compound that consists of hydrogen and one other non-metallic element is known as: a binary acid. between 6 to 7 Answer: It is in between 6 to 7 or neutral. Is TiO2 a ionic or covalent bond? chemistry. When an ionic compound dissolves in solution, the ions of the molecule dissociate. Magnesium reacts with oxygen to produce light that is bright enough to blind you for a short time. 1. ionic compounds are crystalline solids at room temperature. Different chemical salt form of medicinal agent . Because the reaction releases a lot of heat, magnesium burns brightly. ), Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams, Work, Gibbs Free Energy, Cell (Redox) Potentials, Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH), Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust, Kinetics vs. Thermodynamics Controlling a Reaction, Method of Initial Rates (To Determine n and k), Arrhenius Equation, Activation Energies, Catalysts, Chem 14B Uploaded Files (Worksheets, etc. ! Fallout 76 Radscorpion Eggs Location, To produce sodium halides, all halogens react with sodium. Just another site. NH4CIO2 has a weak base and a strong acid, therefore it is a weakly acidic solution. -The ions from $KCl$ derived from a strong acid (HCl) and a strong base (KOH). Due to the presence of lone pairs of electrons, PCl3 PC l 3 has a distorted structure. Except where otherwise noted, data are given for materials in their standard state (at 25 C [77 F], 100 kPa). On the Pauling Scale, for the most common oxidation state, Li = 0.98, Na = 0.93, K = 0.82, Cs = 0.79, Mg = 1.31, and I = 2.66 Do the arithmetic yourself. Methane, also known as CH4, is a covalent compound that has exactly 5 atoms linked by covalent bonds. Production [ edit] . Enter an ionic equation (solubility states are optional) to calculate its complete and net ionic equations. So, Is KCl an acid or base? Ionic bond in MgI2. Is mgl2 ionic or covalent? The simplest explanation is that MgI2 is ionic, because Mg is an alkali metal, which reacts by losing electrons, and I is a halogen, which reacts by gaining them. ClF = Polar Covalent. Practice: Predict the charge on monatomic ions. Write balanced molecular, ionic, and net ionic equations (NIE) for each of the following reactions. In order to obtain anhydrous MgI2, the reaction should be conducted in a strictly anhydrous atmosphere; dry-diethyl ether can be used as a solvent. For instance, hydrogen chloride, HCl, is a gas in which the hydrogen and chlorine are covalently bound, but if HCl is bubbled into water, it ionizes completely to give the H+ and Cl- of a hydrochloric acid solution. Write the balanced (ionic) redox equation for the conversion of Broz into Bra under acidic conditions. See Steps to Balance MgI2 + BaS = BaI2 + MgS, (NH4)3PO4 + ZnSO4 = Zn3(PO4)2 + (NH4)2SO4. somewhere between an electronegativity difference of 0.5 and 0.0, it's a non-polar covalent. Ionic Character has more to do with Electronegativity because the greater the difference in electronegativity the more similar the covalent bond is to an ionic one because the charges are distributed unevenly to a greater degree. Because these salts are highly soluble in water, they are typical ionic halides. Overall Chemical Equation Ensure that the elements on both sides of the molecular equation are balanced by using the online chemical equation balancer. The compound magnesium iodide, MgI2 is soluble in water. If pH value is 12, OH concentration should be 0.01 mol dm 3. 2.32 g/cm 3 (anhydrous) Boiling Point of Magnesium Chloride. It reacts with water to form magnesium hydroxide which is a base. Graduated from ENSAT (national agronomic school of Toulouse) in plant sciences in 2018, I pursued a CIFRE doctorate under contract with SunAgri and INRAE in Avignon between 2019 and 2022. (A cation is a positively charged ion; an anion is a negatively charged ion.) The chemical compounds with the formula MgI2 and its various hydrates MgI2(H2O)x are known as magnesium iodide. The attraction between oppositely charged ions is known as an ionic bond. Find more Chemistry widgets in Wolfram|Alpha. These salts are typical ionic halides, being highly soluble in water. Based on ion sizes, rank these compounds of their expected lattice energy. 1. nitrogen dioxide- covalent (molecular) MgI2- ? (NH4)2CO3. 1. The balanced equation will be calculated along with the solubility states, complete ionic equation, net ionic equation, spectator ions and precipitates. Be able to use most common polyatomic ions. Sodium iodide has a Na(+) counterion and is a metal iodide salt. The simplest explanation is that MgI2 is ionic, because Mg is an alkali metal, which reacts by losing electrons, and I is a halogen, which reacts by gaining them. Because among the halogens the electronegativity is more for Fluorine followed by Chlorine, Bromine, Dodine. The two opposite charges are attracted and form the ionic bond between atoms in Magnesium chloride.---Helpful ResourcesMetals, Non-Metals on the P- Table: https://youtu.be/OoooStZQHdAIonic, Covalent, \u0026 Polar Covalent: https://youtu.be/OHFGXfWB_r4Electronegativity for each element: https://en.wikipedia.org/wiki/Electronegativity---Because we have a combination of a metal and non-metalm MgCl2 (Magnesium chloride) is considered an ionic compound.In general, ionic compounds:- form crystals.- have high melting points and boiling points.- are hard and brittle.- conduct electricity when dissolved in water.- as solids do not conduct electricity.For more chemistry help, see http://www.Breslyn.org. Name the following compounds: 1) KCl potassium . Startseite > Uncategorized > mgi2 ionic or molecular. Mg^(2+) + 2I^(-) rarr MgI_2 How do you know what ions these elements form? (a) Write the chemical formula for propane. Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Is SbCl5 ( Antimony pentachloride ) polar or nonpolar ? The decreasing order of ionic character NaF>NaCl>NaBr>NaI. According to Fajan's rule, the size should be small to have more ionic character. Magnesium Iodides Properties It appears to be a white crystalline solid with no odor. Nitrate compounds are usually soluble in water. Its compounds are widely used in construction and medicine, and magnesium is one of the elements essential to all cellular life. Magnesium iodide is a salt of magnesium and hydrogen iodide. Use uppercase for the first character in the element and lowercase for the second character. Question = Is SiCl2F2polar or nonpolar ? Great math solution app, it gives step by step . cristina's restaurant salsa recipe. Iodide can be ingested or applied topically in this form (such as with povidone iodine and an iodide). When we have a metal and a non-metal the compound is usually considered ionic.Because we have a metal and non-metal in MgCl2 there will be a difference in electronegativity between the metal and non-metal. Ionic compounds are compounds composed of ions, charged particles that form when an atom (or group of atoms) gains or loses electrons. A covalent bond, also called a molecular bond, is a chemical bond that involves the sharing of electron pairs between atoms. A covalent bond is a two-electron bond in . 4. mixed bond (not ionic, not covalent). The bond may result from the electrostatic force of attraction between oppositely charged ions as in ionic bonds; or through the sharing of electrons as in covalent bonds . 2) MgI2 magnesium iodide. Assume all reactions occur in aqueous solution. And acid are the chemical species which can generate H+ ions in the solution. Chemical Formula Writing Worksheet one page worksheet gives compound name and students determine if is covalent or ionic and then write chemical formula 20 compounds please consider buying my whole year high school chemistry course hs chemistry coursehs chemistry individual lessons activities labs quizzes amp tests, b. Neutralization of any strong acid with a strong base always gives a neutral salt. You can see the pH value is 12. These salts are typical ionic halides, being highly soluble in water. Advance Auto, AutoZone, OReilly Auto, and Walmart Tire are the most popular motor oil retailers. Question = Is SCl6polar or nonpolar ? Bond type The need for the number of electrons lost being equal to the number of electrons gained explains why ionic compounds have the ratio of cations to anions that they do. Ammonium nitrate is also known for its oxidizing powers. 3. If polar, properly indicate the polarity using the + and - symbols and by indicating the correct dipole moment (otherwise, choose the blank option). HCl = Polar. Naming monatomic ions and ionic compounds. Answer: It is magnesium perchlorate. Juni 2022; Beitrags-Kategorie: xrp fee calculator; Beitrags-Kommentare: . We will begin by learning the rules of naming ionic compounds first. Compound states [like (s) (aq) or (g)] are not required. See Steps to Balance Na + MgI2 = NaI + Mg, (NH4)3PO4 + ZnSO4 = Zn3(PO4)2 + (NH4)2SO4. C 2 H 6 = Nonpolar. Answer = IF4- isNonpolar What is polarand non-polar? . This is the currently selected item. Ammonium nitrate readily dissolves in water by dissociating into its constituent ions. Like other metal oxides it is a basic oxide because it dissolves in water to form calcium hydroxide. Mg (NO3)2 + RbI = MgI2 + Rb (NO3) Net Ionic Equation Net Ionic Equation Overall Chemical Equation Ensure that the elements on both sides of the molecular equation are balanced by using the online chemical equation balancer. MgI2. What is the molecular, ionic, and net ionic equations for Copper(II) sulfate + sodium phosphate? 2. the degree of ionicity is about 70%, 30% covalent . These salts are typical ionic halides, being highly soluble in water. To tell if MgCl2 (Magnesium chloride) is ionic or covalent (also called molecular) we look at the Periodic Table that and see that Mg is a metal and Cl is a non-metal. Also, electronegativities are. Leonard, LLC, Copyright 2023 TipsFolder.com | Powered by Astra WordPress Theme. This compound is also known as Magnesium Iodide. MgSO4 This salt was formed from the reaction of a strong base, magnesium hydroxide, with strong acid, sulfuric acid. HCN = Polar. . The bond between the magnesium ion and the perclorate ion is Ionic Bond whereas the bond between chlorine and oxygen is covalent bond. For example, C6H5C2H5 + O2 = C6H5OH + CO2 + H2O will not be balanced, but XC2H5 + O2 = XOH + CO2 + H2O will. In the solid state, ionic compounds are in crystal lattice containing many ions each of the cation and . Ionic Molecular Answer Bank CH4 KBr SO2 FeCl3. Magnesium iodide is the name for the chemical compounds with the formulas MgI 2 and its various hydrates MgI 2 (H 2 O) x. What is the name of the binary acid . Magnesium is safe and readily available. Magnesium dichloride and its salts are ionic halides and appear as thin white to gray granules. Is calcium oxide an ionic or covalent bond . What are the three properties of ionic compounds. Top Jennifer Tuell 1B Posts: 34 Joined: Fri Apr 06, 2018 6:05 pm Magnesium iodide can be prepared from magnesium oxide, magnesium hydroxide, and magnesium carbonate by treatment with hydroiodic acid:[3], Magnesium iodide is stable at high heat under a hydrogen atmosphere, but decomposes in air at normal temperatures, turning brown from the release of elemental iodine. It is odourless and is highly soluble in water. magnesium bromide ionic or covalent 1 Mg, Magnesium, has an electronegativity of 1.2 while Br, Bromine, has an . Overall Chemical Equation Ensure that the elements on both sides of the molecular equation are balanced by using the online chemical equation balancer. As a general rule of thumb, compounds that involve a metal binding with either a non-metal or a semi-metal will display ionic bonding. 9/10 Quality score 72247+ Completed orders People said. mixed bond (not ionic, not covalent). Pacific Coast First Nations Clothing, Is magnesium and iodine ionic (MgI2)? Enter an ionic equation (solubility states are optional) to calculate its complete and net ionic equations. Lattice energies calculated for ionic compounds are typically much higher than bond dissociation energies measured for covalent bonds. CH 2 F 2 = Polar. Both magnesium sulfate & magnesium chloride are acidic salts with pH values lower than 7 & the sulfate has a lower value than the chloride provided that they have the same concentrations. I am currently continuing at SunAgri as an R&D engineer. F eI 2 is an ionic compound called Ferrous Iodide or Iron (II) Iodide. a.Al_2O_3 b.ClF_5 c.Mgl_2 d . Answer = SiCl2F2 is Polar What is polarand non-polar? covalent bond. The two elements will create an ionic bond (MgI2). Thus NaF is more ionic. First write and balance the molecular equation. Understand and correctly perform "crisscross" method for creating stable ionic compounds chemistry. Compound states [like (s) (aq) or (g)] are not required. Also, electronegativities are. Ammonia is a molecular compound and not ionic. Magnesium iodide is the name for the chemical compounds with the formulas MgI2 and its various hydrates MgI2(H2O)x. MgI 2 + BaS = BaI 2 + MgS See Steps to Balance MgI2 + BaS = BaI2 + MgS Solubility Equation Determine the state or phase of each substance (gas=g, liquid=l, solid/non-soluble=s, aqueous/soluble=aq) in its undissociated form by using the . In an ionic compound, the size of the ions affects the internuclear distance (the distance between the centers of adjacent ions), which affects lattice energy (a measure of the attractive force holding those ions together). A molecular formula can be derived from an empirical formula using the molar mass. To tell if HI (Hydrogen iodide or Hydroiodic acid) is ionic or covalent (also called molecular) we look at the Periodic Table that and see that H is non-metal and Br is a non-metal. This salt is acidic in nature since it is derived from a weak base (NH3) and a strong acid (HNO3). Electronegativities of potassium and iodine are very different. Molecular weight calculation: 24.305 + 126.90447*2. Motivos Familiares Imperativos Que Significa, Ionic, covalent and metallic bonds are all different types of chemical bonds. In chloroform and hexane, iodine dissolves easily, but not in water. The Periodic Tables Group 17 contains iodine. Since the iodide ion only has a charge of I 1 and there are two iodide ions in the molecule, this informs us that the iron is in the F e+2 oxidation state.