A sample of hydrochloric acid contains 20 % hydrochloric acid by weight. How much of this acid is required for the complete reduction of 50 g of calcium carbonate ?

A sample of hydrochloric acid contains 20 % hydrochloric acid by weigh

1.	A sample of hydrochloric acid contains 20 % hydrochloric acid by weight. How much of this acid is required for the complete reduction of 50 g of calcium carbonate ?
Answer» Solution :Chemical equation for the reaciton is : `underset(underset(=100g)(40+12+48))(CaCO_(3))+underset(underset(=73g)(2(1+35.5)))(2HCl)rarrCaCl_(2)+H_(2)O+CO_(2)` 100 g of calcium carbonate require acid = 73 g 50 g of calcium carbonate require acid `= (73)/(100) xx 50 = 36.5 g` Mass of the SAMPLE of hydrochloric `= 36.5 xx (100)/(20) = 182.5 g`.