6-40. An acidic solution containing 0.010 M La3+ is treated with NaOH until La(OH)3 precipitates. At what pH does this occur?
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The balanced equation for the dissolution of La(OH)3 is: La(OH)3 (s) <=> La3+ (aq) + 3OH- (aq) The Ksp expression for this reaction is: Ksp = [La3+] [OH-]^3 We are given that the initial concentration of La3+ is 0.010 M. Let x be the concentration of OH- ions Show more…
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