Equilibrium Examples

Equilibrium Examples - 1. Calculate the solubility of...

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Page 1 1. Calculate the solubility of silver phosphate, Ag 3 PO 4 , in pure water. K sp = 2.6 10 -18 A) 4.0 10 -5 M B) 1.8 10 -5 M C) 4.0 10 -6 M D) 1.5 10 -6 M E) < 1.0 10 -6 M Disssolution reaction: Ag 3 PO 4 (s) 3 Ag + + PO 4 3- K sp = [Ag + ] 3 [PO 4 3- ] [Ag+] = 3 [PO 4 3- ] K = 27 [PO 4 3- ] 4 [PO 4 3- ] = (K/27) 1/4 = 1.76 10 -5 M = solubility of Ag 3 PO 4 2. Hydrogen sulfide will react with water as shown in the following reactions.What is the value of K 2 ? H 2 S( g ) + H 2 O( l ) H 3 O + ( aq ) + HS - ( aq ) K 1 = 1.0 10 -7 HS - ( aq ) + H 2 O( l ) H 3 O + ( aq ) + S 2- (
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