已知,Ksp(AgCl)=1.8*10-10,Ksp(AgI)=1.5*10-16,Ksp(Ag2CrO4)=2.0*10-12,则下列难溶盐的饱和溶液中,Ag+浓度大小顺序正确的是A AgCl>AgI>Ag2CrO4B AgCl>Ag2CrO4>AgIC Ag2CrO4>AgCl>AgID Ag2CrO4>AgI>AgCl
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![已知,Ksp(AgCl)=1.8*10-10,Ksp(AgI)=1.5*10-16,Ksp(Ag2CrO4)=2.0*10-12,则下列难溶盐的饱和溶液中,Ag+浓度大小顺序正确的是A AgCl>AgI>Ag2CrO4B AgCl>Ag2CrO4>AgIC Ag2CrO4>AgCl>AgID Ag2CrO4>AgI>AgCl](/uploads/image/z/4882463-71-3.jpg?t=%E5%B7%B2%E7%9F%A5%2CKsp%28AgCl%29%3D1.8%2A10-10%2CKsp%28AgI%29%3D1.5%2A10-16%2CKsp%28Ag2CrO4%29%3D2.0%2A10-12%2C%E5%88%99%E4%B8%8B%E5%88%97%E9%9A%BE%E6%BA%B6%E7%9B%90%E7%9A%84%E9%A5%B1%E5%92%8C%E6%BA%B6%E6%B6%B2%E4%B8%AD%2CAg%2B%E6%B5%93%E5%BA%A6%E5%A4%A7%E5%B0%8F%E9%A1%BA%E5%BA%8F%E6%AD%A3%E7%A1%AE%E7%9A%84%E6%98%AFA+AgCl%3EAgI%3EAg2CrO4B+AgCl%3EAg2CrO4%3EAgIC+Ag2CrO4%3EAgCl%3EAgID+Ag2CrO4%3EAgI%3EAgCl)
已知,Ksp(AgCl)=1.8*10-10,Ksp(AgI)=1.5*10-16,Ksp(Ag2CrO4)=2.0*10-12,则下列难溶盐的饱和溶液中,Ag+浓度大小顺序正确的是A AgCl>AgI>Ag2CrO4B AgCl>Ag2CrO4>AgIC Ag2CrO4>AgCl>AgID Ag2CrO4>AgI>AgCl
已知,Ksp(AgCl)=1.8*10-10,Ksp(AgI)=1.5*10-16,Ksp(Ag2CrO4)=2.0*10-12,则下列难溶盐的饱和溶液中,
Ag+浓度大小顺序正确的是
A AgCl>AgI>Ag2CrO4
B AgCl>Ag2CrO4>AgI
C Ag2CrO4>AgCl>AgI
D Ag2CrO4>AgI>AgCl
已知,Ksp(AgCl)=1.8*10-10,Ksp(AgI)=1.5*10-16,Ksp(Ag2CrO4)=2.0*10-12,则下列难溶盐的饱和溶液中,Ag+浓度大小顺序正确的是A AgCl>AgI>Ag2CrO4B AgCl>Ag2CrO4>AgIC Ag2CrO4>AgCl>AgID Ag2CrO4>AgI>AgCl
选C
解析:设难溶盐的饱和溶液中Ag+浓度为x
AgCI饱和溶液中:AgCl==(可逆)== Ag+ + Cl-
x x
Ksp(AgCl)=[Ag+][Cl-]=x2=1.8×10-10 开方得 x = 1.34 X 10^-5 mol/L
同理AgI饱和溶液中:Agl==(可逆)== Ag+ + I-
x x
Ksp=[Ag+][I-]=x^2 开方得 x=1.22*10^-8mol/L
Ag2CrO4溶液中:Ag2CrO4==(可逆)== 2Ag+ + CrO42-
x x/2
ksp=[Ag+]^2*[CrO42-]=[Ag+]^2*1/2*[Ag+]=1/2*x^3=2.0*10-12,*x^3=4*10-12
开立方,x=5.8×10^-4mol/L很显然比前两者要大
所以:Ag2CrO4>AgCl>AgI