Determine if the following statements are True or False. If they are false corre

Question

Determine if the following statements are True or False. If they are false correct the statement so it is true. If a substance is oxidized, it is gaining electrons. If an ion is oxidized, its oxidation number increases Oxidation can occur without oxygen. Oxidation can occur without reduction. Determine the oxidation number of the underlined element in the following compounds or species. For the following redox reactions, indicate which element is oxidized and which is reducedor the oxidizing and reducing agent. P_4 (s) + 10HClO(aq) + 6 H_2O (l) rightarrow 4 H_3PO_4 (aq) + 10HCl(aq) Oxidized: Reduced: Br_2 (l) + 2 K (s) rightarrow 2 KBr (s) Oxidizing agent: Reducing agent: Balance the following oxidation-reduction reactions by the half reaction method, CuCl_2(aq) + Al (s) rightarrow AlCl_3(aq) + Cu(s) Oxidation: Reduction: H_2(g) +Ag^+ rightarrow Ag (s) + H^+ (aq) Oxidation: Reduction:

Explanation / Answer

3)

a - oxidation is the loss of electrons, therefore this statement is FALSE

b - if an ion is oxidized, the oxidaton number increases TRUE

c - oxidation ay occur in many cases, evne between metals, the important thing is to move electrons and oxidaiton numbers, therefore this statement is TRUE

d - There is electorn balance, tehrefore, for eveyr oxidation, ther eis reduction, this statemetn is FALSE

4)

a. 0

b. MnO4- .... M + 4(-2) = -1 then M = -1+8 = +7

c. HClO2 ... Cl+(1)+2*(-2) = 0; then Cl + 1 -4 = 0 Cl = +3

d. Na2O2... 2(+1) + 2(O)= 0; then O = -1

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