Asked by LT
                If two salts AX and BX2, have the same Ksp values of 4.0x10^-12 at a given temperature, then
A. their molar solubilities in water are the same
B. the salts are more soluble in 0.1 M NaX than in water
C. the molar solubility of AX in water is less than that of BX2
D. addition of NaX will not affect the colubilities of the salt.
            
        A. their molar solubilities in water are the same
B. the salts are more soluble in 0.1 M NaX than in water
C. the molar solubility of AX in water is less than that of BX2
D. addition of NaX will not affect the colubilities of the salt.
Answers
                    Answered by
            DrBob222
            
    which do you think is correct and why? I suggest you make up problems and work each one; for example, see if A is a true statement.
AX ==> A^+ + X^-
Ksp = (x)(x) = 4 x 10^-12
x= sqrt 4 x 10^-12 = 2 x 10^-6 M
AX2 ==> A^+2 + 2X^-
Ksp = (x)(2x)^2 = 4 x 10^-12
4x^3 = 4 x 10^-12
x = 1 x 10^-4 M
So they are not the same and A is not true. ETC. For the common ion in B, just use 0.1 M NaX.
    
AX ==> A^+ + X^-
Ksp = (x)(x) = 4 x 10^-12
x= sqrt 4 x 10^-12 = 2 x 10^-6 M
AX2 ==> A^+2 + 2X^-
Ksp = (x)(2x)^2 = 4 x 10^-12
4x^3 = 4 x 10^-12
x = 1 x 10^-4 M
So they are not the same and A is not true. ETC. For the common ion in B, just use 0.1 M NaX.
                    Answered by
            LT
            
    well C says AX is less than BX2 and it is so i thought it would be that one. 
    
                    Answered by
            DrBob222
            
    That's right.
    
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