Question

A saturated $CaCO_3$stock solution is existing at 25°C. In one experiment (i) 25 g $Na_2CO_3$is added to the stock solution. In another experiment (ii) 25 g $Na_2SO_4$ is added to the stock solution. Select the correct statement from the following.

• A. Addition of (i) increases the concentration of $Ca^{2+}$ and addition of (ii) decreases the concentration of $Ca^{2+}$
• B. Addition of (i) decreases the concentration of $Ca^{2+}$ and addition of (ii) increases the concentration of $Ca^{2+}$
• C. Addition of (i) and (ii) increase the concentration of $Ca^{2+}$
• D. Addition of (i) and (ii) decrease the concentration of $Ca^{2+}$

Answer 1

Answer: (B)

Addition of (i) decreases the concentration of $Ca^{2+}$ and addition of (ii) increases the concentration of $Ca^{2+}$

Answer 2

The correct answer is (B) :

Addition of (i) decreases the concentration of $Ca^{2+}$ and addition of (ii) increases the concentration of $Ca^{2+}$