(a) lead(II) carbonate;
(b) nickel(II) hydroxide;
(c) strontrium phosphate;
(d) barium sulfate.
I am trying to figure these out so far for the first one I have PbCO3 + H2O <--> PbO + H2CO3 so the eq expression would be [PbCO3][H2O]/PbO][H2CO3]?
Write the equiibrium expression for the equilibrium occuring when each of these solutes is added to water.?
2015-09-01 7:25 pm
回答 (3)
2015-09-01 7:50 pm
✔ 最佳答案
The equilibrium when added to water is just the equilibrium between the solid and the aqueous ions. So, for example:(a) PbCO3(s) <--> Pb2+(aq) + CO32-(aq)
Ksp = [Pb2+][CO32-]
(b) NI(OH)2(s) <--> Ni2+(aq) + 2 OH-(aq)
Ksp = [NI2+][OH-]^2
Just write the dissolving equilibrium for each salt. At this point, you shouldn't worry about any additional reactions of the ions formed. Remember that the solid does not appear in the equation for K.
2015-09-01 9:59 pm
(a)
PbCO₃(s) ⇌ Pb²⁺(aq) + CO₃²⁻(aq)
Equilibrium expression: Ksp = [Pb²⁺] [CO₃²⁻]
(b)
Ni(OH)₂(s) ⇌ Ni²⁺(aq) + 2OH⁻(aq)
Equilibrium expression: Ksp = [Ni²⁺] [OH⁻]²
(c)
Sr₃(PO₄)₂(s) ⇌ 3Sr²⁺(aq) + 2PO₄³⁻(aq)
Equilibrium expression: Ksp = [Sr²⁺]³ [PO₄²⁻]²
(d)
BaSO₄(s) ⇌ Ba²⁺(aq) + SO₄²⁻(aq)
Equilibrium expression: Ksp = [Ba²⁺] [SO₄²⁻]
PbCO₃(s) ⇌ Pb²⁺(aq) + CO₃²⁻(aq)
Equilibrium expression: Ksp = [Pb²⁺] [CO₃²⁻]
(b)
Ni(OH)₂(s) ⇌ Ni²⁺(aq) + 2OH⁻(aq)
Equilibrium expression: Ksp = [Ni²⁺] [OH⁻]²
(c)
Sr₃(PO₄)₂(s) ⇌ 3Sr²⁺(aq) + 2PO₄³⁻(aq)
Equilibrium expression: Ksp = [Sr²⁺]³ [PO₄²⁻]²
(d)
BaSO₄(s) ⇌ Ba²⁺(aq) + SO₄²⁻(aq)
Equilibrium expression: Ksp = [Ba²⁺] [SO₄²⁻]
2015-09-02 7:04 pm
Thank you so much, both of you!
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20150901112552AABBwF9