Question

For each of the following ionic compounds, state whether
the solubility will increase, decrease, or remain unchanged
as a solution at pH 7 is made acidic.
(a) PbI2 (b) AgOH (c) Ca3(PO4)2

Answer 1

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Answer 2

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Answer 3

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Answer 4

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Answer 5

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Answer 6

For each of the following ionic compounds, state whether the solubility will
increase, decrease, or remain unchanged as a solution at pH 7 is made acidic.
a. PbI2
PbI2 ==> Pb2+ (aq) + 2I-
(aq)
Since I- is the conjugate base of a strong acid (HI), solubility will remain
unchanged as the solution is made acidic.
b. AgOH
AgOH(s) ==> Ag+
(aq) + HO-
(aq)
Since HO-
is the conjugate base of a weak acid (H2O) and is thus a strong
base, solubility will increase as the solution is made acidic, since OH is
consumed by the added acid.
c. Ca3(PO4)2
Ca3(PO4)2 ==> 3Ca2+ (aq) + 2PO4
3- (aq)
Since PO4
3- is the conjugate base of a weak acid (HPO4
2-), the solubility
will increase as the solution is made acidic

Answer 7

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Answer 8

You Welcome