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Determine the oxidation state of X (a fictional element) in the following compounds/polyatomic ions, using the periodic table for the real elements/the list of polyatomic ions, by filling in the numerical answers (ie, 1, -5 etc):
Given:
|
Polyatomic name: |
Polyatomic formula: |
|
sulfate |
SO42- |
|
hydroxide |
OH1- |
|
ammonium |
NH4+ |
|
carbonate |
CO32- |
|
nitrate |
NO31- |
a) XBr3-1: the oxidation state of X is:
b) (NH4)2XO3 : the oxidation state of X is:
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- The iron content of hemoglobin is determined by destroying the hemoglobin molecule and producing small water-soluble ions and molecules. The iron in the aqueous solution is reduced to iron(II) ion and then titrated against potassium permanganate. In the titration, iron(ll) is oxidized to iron(III) and permanganate is reduced to manganese(II) ion. A 5.00-g sample of hemoglobin requires 32.3 mL of a 0.002100 M solution of potassium permanganate. The reaction with permanganate ion is MnO4(aq)+8H+(aq)+5Fe2+(aq)Mn2+(aq)+5Fe3+(aq)+4H2O What is the mass percent of iron in hemoglobin?Write balanced net ionic equations for the following reactions in acid solution. (a) Liquid hydrazine reacts with an aqueous solution of sodium bromate. Nitrogen gas and bromide ions are formed. (b) Solid phosphorus (P4) reacts with an aqueous solution of nitrate to form nitrogen oxide gas and dihydrogen phosphate (H2PO4-) ions. (c) Aqueous solutions of potassium sulfite and potassium permanganate react. Sulfate and manganese(II) ions are formed.Balance the following redox reactions: (a) In acidic solution, xenon trioxide reacts with iodide ion toproduce xenon gas, triiodide ion (I₃⁻), and water. (b) In basic solution, the hydrogen xenate ion (HXeO₄⁻) dispro-portionates to xenon gas, perxenate ion (XeO₆⁴⁻), water, andoxygen gas.(c) In basic solution, bismuthate ion (BiO₃⁻) reacts with man-ganese(II) ion to produce bismuth(III) and permanganate ions. (d) In basic solution, oxygen difluoride reacts to produce fluo-ride ion, oxygen gas, and water. (e) In acidic solution, manganese(IV) oxide reacts with sulfiteion to form manganese(II) ion, water, and dithionate ion(S₂O₆²⁻).(f) In one of the few reactions known for a statine, the oxidationof astinide ion by chlorine gas in acid solution produces astinateion (AtO₃⁻) and chloride ion.
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- Determine the oxidation state for each of the elements below. The oxidation state of ... zinc ... in ... zinc hydroxideZn(OH)2 ... is ________? The oxidation state of chlorine in magnesium chlorideMgCl2 is ________? The oxidation state of bismuth in bismuth hydroxideBi(OH)3 is _________?The sulfur produced by aqueous chemistry in the previous problem is a destructive environmental pollutant when it is produced by the combustion of sulfur impurities present in fossil fuels. In the atmosphere, sulfur dioxide (SO2(g)) can dissolve into with water (H2O(l)) droplets to form a sulfurous acid (H2SO3(aq)) solution and return to the ground as acid rain. Write a balanced chemical equation for the production of sulfurous acid by this reaction.(a) Identify the species that was reduced in the titration reaction. Justify your answer in terms of oxidation numbers. (c) Given that the concentration of KMnO4(aq) was 0.0235M, calculate the number of moles of MnO4− ions that completely reacted with the H2C2O4. d) The student proposes to perform another titration using a 0.139g sample of H2C2O4, but this time using 0.00143MKMnO4(aq) in the buret. Would this titrant concentration be a reasonable choice to use if the student followed the same procedure and used the same equipment as before? Justify your respons
- Chlorine gas (Cl2) can react with water to generate hypochlorous acid (HOCl), following the reaction: Cl2 + H2O -> HOCl + H+ + Cl-. HOCl is a strong oxidant and can subsequently oxidize ammonia (NH3) to NH2Cl, NHCl2, and NCl3. Calculate the Cl2 required, in mg/L, to oxidize 1 mg/L of NH3 in water if 70% of the NH3 is oxidized to NH2Cl, 20% is oxidized to NHCl2, 10% is oxidized to NCl3.The proper assignment of oxidation numbers to the elements in the polyatomic ion SO32- would be what?A secondary step in the process to produce ultra-pure silicon forelectronic applications involves silicon tetrachloride with magnesium in a redox reaction:__SiCl + __Mg→ __Si + __MgClBalance the equation above and assign the oxidation numbers (O.N.) of the atoms in the reactants and products. REACTANTS SIDEO.N. of Si in SiCl : ______O.N. of Cl in SiCl : ______O.N. of Mg: ______PRODUCTS SIDEO.N. of Si: ______O.N. of Mg in MgCl : _______O.N. of Cl in MgCl : ______
