25g limestone containing 20% impurities fully reacts with 100g sufficient dilute hydrochloric acid (impurities do not participate in the reaction) Requirements: 1. What is the mass of carbon dioxide generated? 2. How many kilograms of calcium chloride are generated?
If it contains 20% impurities, the content of CaCO3 is 80%, and its mass is 25 * 80% = 20g,
100 111 44
20g Y X
Column ratio, solution,
X = 8.8 g
Y = 22.2g
Answer: the mass of CO2 is 8.8g and the mass of calcium chloride is 22.2g