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Physics Guru is an online education and competitive examinations preparation portal founded by Manish Verma, an IIT Madras alumnus, providing learning resources for competitive examinations.

The emphasis is on conceptual understanding, analytical thinking and problem solving rather than simply memorising formulas and standard methods.

The objective is to help students understand what they are learning and develop the ability to solve problems they have not seen before.

Two salts $A_2 X $ and MX have the same value of ....

Two salts $A_2 X $ and MX have the same value of solubility product of $4.0 \times 10^ {-12} $. The ratio of their molar solubilities i.e. $\frac{{S({A_2}X)}}{{S(MX)}} =$ _ _ _ _ . (Round off to the nearest integer)

Solution

We have, $4.0 \times {10^{ - 12}} = 4[S{({A_2}X)]^3}$

$ \Rightarrow S({A_2}X) = {10^{ - 4}}$

Also, $4.0 \times {10^{ - 12}} = [S{(MX)]^2}$

$ \Rightarrow S(MX) = 2.0 \times {10^{ - 6}}$

The ratio, $\frac{{S({A_2}X)}}{{S(MX)}} = \frac{{{{10}^{ - 4}}}}{{2.0 \times {{10}^{ - 6}}}} = 50$