Answer to Question #254407 in Physical Chemistry for Chemistry

Question

In our college laboratory a container containing 5 litres of a commercial sample of hydrochloric acid (36.2 % by weight with a density of 1.19 g/ml) developed a crack and all the HCl was spilt on the floor. It can be neutralised with limestone powder.

[atomic masses: Ca = 40, C = 12, O = 16]

(a) Write the equation for the reaction between limestone and hydrochloric acid.

(b) How many moles of hydrochloric acid was spilt?

(c) How many moles of calcium carbonate will neutralise the acid?

(d) What minimum mass of limestone powder is needed to neutralise the acid if the limestone is 70% pure?

Answer 1

CaCO3​+2HCl→CaCl2​+H2​O+CO2​