What is molar solubility of BaSO4 (ksp=1.1 x 10^-10)?

Question

a. 1.0 x 10-5

b. 1.1 x 10-10

c. 5.5 x 10-11

d. 1.2 x 10-20

Answer 1

BaSO4(s) <--> Ba^2+(aq) + SO4^2-(aq)

Ksp = [Ba^2+][SO4^2-] = 1.1E-10

Let concentrations be denoted by x

Thus, (x)(x) = 1.1E-10

x² = 1.1E-10

x = 1.05E-5M

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http://members.aol.com/profchm/soluble.h...

[Answer: A]

Answer 2

answer a

ksp =conc Ba++  8 conc SO4