The following values will be useful for the problems in this chapter. Which one

Question

The following values will be useful for the problems in this chapter.

Which one of the following salts produces basic solutions when it is dissolved in water?

KCl

NH4Br

NH4I

NaNO3

NH4OCl

Acid K Substance or Species K HF Ka = 7.2 × 10-4 NH3 Kb = 1.8 × 10-5 HNO2 Ka = 4.5 × 10-4 (CH3)3N Kb = 7.4 × 10-5 CH3COOH Ka = 1.8 × 10-5 [Co(OH2)6]2+ Ka = 5.0 × 10-10 HOCl Ka = 3.5 × 10-8 [Fe(OH2)6]2+ Ka = 3.0 × 10-10 HOBr Ka = 2.5 × 10-9 [Fe(OH2)6]3+ Ka = 4.0 × 10-3 HOCN Ka = 3.5 × 10-4 [Be(OH2)4]2+ Ka = 1.0 × 10-5 HCN Ka = 4.0 × 10-10 [Cu(OH2)4]2+ Ka = 1.0 × 10-8 H2SO4 Ka1 = very large HBO2 Ka = 6.0 × 10-10 Ka2 = 1.2 × 10-2 (COOH)2 Ka1 = 5.9 × 10-2 H2CO3 Ka1 = 4.2 × 10-7 Ka2 = 6.4 × 10-5 Ka2 = 4.8 × 10-11 CH3NH2 Kb = 5.0 × 10-4 H3PO4 Ka1 = 7.5 × 10-3 Ka2 = 6.2 × 10-8 Ka3 = 4.8 × 10-13

Explanation / Answer

NH4Br NH4+ + Br- ......this is the dissociation reaction...the resulting ions are most likely to form a basic solution since water will produce the hydroxide ions....compared to other salts provided

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