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Chemistry: Principles and Reactions

223 SOLVED PROBLEMS

Question: 23.7

Consider the structures shown in Table 23.3. (a) How many a-amino acids contain only one chiral carbon atom? (b) How many contain only one -NH2 group? ...

Verified Answer:

(a) 17; the exceptions are glycine (0), isoleucine...
Question: 17.5

Consider the voltaic cell in which the reaction is 2Ag^+(aq) + Cd(s) → 2Ag(s) + Cd^2+(aq) a Use Table 17.1 to calculate E° for the voltaic cell. ...

Verified Answer:

a 1. Oxidation numbers            Ag: +1 → 0 (redu...
Question: 17.6

Consider Fe^2+ at standard conditions. a Will the reaction below occur? 2Fe^3+(aq) + 2I^-(aq) → 2Fe^2+(aq) + I2(s) ...

Verified Answer:

a 1. oxidation numbers                 Fe: +3 → +2...
Question: 17.9

Consider a voltaic cell at 25°C in which the reaction is Zn(s) + 2H^+(aq) → Zn^2+(aq) + H2(g) It is found that the voltage is +0.560 V when [Zn^2+] = 0.85 M and PH2 = 0.988 atm. What is the pH in the H2-H half-cell? ...

Verified Answer:

1. Oxidation numbers                      Zn: 0 → ...
Question: 21.3

Using Table 17.1, decide whether hydrogen peroxide will react with (oxidize or reduce) the following ions in acid solution at standard concentrations: I^-, Sn^2+, and Co^2+ ...

Verified Answer:

I^- oxidation                  [lat...
Question: 17.4

Consider the following species in acidic solution: MnO4^-, I^-, NO3^-, H2S, and Fe^2+. a Using Table 17.1, classify each of these as an oxidizing and/or reducing agent. ...

Verified Answer:

a {MnO_{4}}^{-}        found in the...
Question: 14.3

The food industry uses the acetic acid/sodium acetate buffer to control the pH of some prepared foods. When NaOH is added to acetic acid (HAc) to prepare the buffer, the following reaction occurs: HAc(aq) + OH^-(aq) → Ac^-(aq) + H2O ...

Verified Answer:

a 1. Table          \begin{array}{ll}\hline...
Question: 13.11

Consider sodium hypochlorite, NaOCl, the main component in household bleach. The hypochlorite ion, OCl^-, has Kb = 3.6 ×10^-7. A solution is prepared by dissolving 12.0 g of NaOCl (MM = 74.45 g/mol) in enough water to make 835 mL of solution. ...

Verified Answer:

a 1. [\quad ]_o] for NaOCl         ...
Question: 13.10

Write an equation to explain why NO2^-, Na2CO3, and KHCO3 produce basic water solutions. ...

Verified Answer:

{NO_2}^-                      [lat...
Question: 13.7

Nicotinic acid, HC6H4O2N (Ka = 1.4 ×10^-5), is another name for niacin, an important member of the vitamin B group. Determine [H^+] in a solution prepared by dissolving 3.0 g of nicotinic acid (MM = 123.11 g/mol), HNic, in enough water to form 245 mL of solution. ...

Verified Answer:

1.[\quad ]_o for HNic           [la...
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