A two-step laboratory procedure is carried out to prepare a solid sample of calcium…
CHEMISTRY · Multi-part · A Level · Chemistry · Amount of substance · Amount of substance
Problem
A two-step laboratory procedure is carried out to prepare a solid sample of calcium carbonate.
Step 1 A mass of 5.00 g of solid sodium carbonate is completely reacted with excess 1.50 M hydrochloric acid. The carbon dioxide produced is dried and then collected.
Step 2 The dry carbon dioxide from Step 1 is bubbled into 500.0 mL of 0.125 M calcium hydroxide solution, producing a precipitate of calcium carbonate.
(a) Calculate the number of moles of carbon dioxide produced in Step 1.
(b) Calculate the number of moles of calcium hydroxide present before Step 2 begins.
(c) Identify the limiting reagent for the reaction in Step 2 and justify your answer with calculations.
(d) Determine the theoretical mass of calcium carbonate that can be obtained from Step 2.