CHEMISTRY · Multi-part · A Level · Chemistry · Amount of substance · Amount of substance
Problem
When limestone is heated, calcium carbonate decomposes according to
CaCO3(s)→CaO(s)+CO2(g)
A certain industrial kiln must deliver exactly 250.g of carbon dioxide for a downstream process. The limestone available is 85.0%CaCO3 by mass; the remainder is inert material.
(a) Calculate the mass of pure CaCO3 that must decompose to produce 250.g of CO2.
(b) Based on the purity given, determine the total mass of limestone that must be fed into the kiln to supply the required amount of CaCO3.