1.20g sample of $Na_2CO_3$ and $K_2CO_3$ was dissolved in water to form 100ml of a solution.20ml of this solution required 40ml of 0.1N HCl for complete neutralization.Calculate the weight of $Na_2CO_3$ in mixture. If another 20 ml of this solution is treated with excess of $BaCl_2$,what will be the weight of precipitate?

Question

$\begin{array}{1 1}(a)\;0.5962g,0.394g&(b)\;0.234g,0.142g\\(c)\;0.1243g,0.235g&(d)\;0.42g,0.24g\end{array}$