When identifying "redox" features, what portion of the redox reaction do the gray colors represent? Question 3 options: leaching staining reduction oxidation

Order the following oxidizing agents by increasing strength under standard-state conditions: O2(g); MnO4(aq); NO3 (aq) (in acidic solution ).

Determine the oxidation state of each of the elements of the following substances. In which of the following substances does the oxidation state of manganese have the highest value?

Indicate whether the following balanced equations involve oxidation–reduction. If they do, identify the elements that undergo changes in oxidation number.(a) PBr31l2 + 3 H2O1l2 ¡ H3PO31aq2 + 3 HBr1aq2(b) NaI1aq2 + 3 HOCl1aq2 ¡ NaIO31aq2 + 3 HCl1aq2(c) 3 SO21g2 + 2 HNO31aq2 + 2 H2O1l2 ¡ 3 H2SO41aq2 + 2 NO1g2

Silver tarnish is the result of the oxide on the silver surface reacting with hydrogen sulfide (H2S) in air. This leaves a black film of silver sulfide (Ag2S).Polishing the tarnished silver will restore the shine but at the expense of some of the silver metal. An alternative process is to allow aluminumto reduce the silver in the presence of a solution of sodium bicarbonate (baking sodium) electrolyte. 1. Assume that Aluminumand Silver Sulfideare the starting substances (reactants) in the reaction: a.Write a balanced chemical equation describing the ”re-creation” of silver, using the information in the case study.    b.State the names of the products that are produced from this reaction.   c.What type of reaction(s) is/are being represented by the chemical reaction you wrote in part (a)?   d.Is the reaction in part (a) an oxidation-reduction (redox) reaction?     e.If this is a redox reaction, then identify the following:   What is undergoing oxidation (what is being oxidized)?…

Complete and balance the following redox reaction in basic solution Pb2*(aq) + 10: (aq) → PbO2(s) + I2(s) |4– 3- |2+ 03+ 4+ 1 2 4 6. 7 9. 1 |2 3 Os 9 (1) (g) (aq) H+ H30 H2O e Pb OH Reset • x H2O Delete LO +

3Zn + 2NO,+ 8H*→2NO + 3Zn2++ 4H,0 In the above reaction, the oxidation state of nitrogen changes from | to How many electrons are transferred in the reaction?

NO, + Ni+ 3H+. →Ni²+ + HNO2+ H,0 In the above reaction, the oxidation state of nitrogen changes from to How many electrons are transferred in the reaction?

93 Chemistry I Laboratory Manual, 2019 Revision Questions: gy muibor alo vialom od W (E 1) Samples containing iron(II) ion can be titrated with solutions containing dichromate ion under acidic conditions. OCHS Cr2072- + 6Fe2+ + 14H* → 2Cr+ + 6Fe3+ + 7H2O itio (a) Which ion is oxidized in this reaction? (b) Which ion is the reducing agent in this reaction? ry nistry ple. (c) If a 1.924 g sample containing iron(II) sulfate is dissolved and requires 36.1 mL of 0.0100 M K2Cr2O7 solution to titrate it, what is the percent iron(II) sulfate in the at sample? routine tiration de enin rntory skills on of sodiu de KH ph pu that the

The oxidation number of Mn in MnO₂ is