Acidic oxides such as carbon dioxide react with basic oxides like calcium oxide (CaO) and barium oxide (BaO) to form salts (metal carbonates).
(a) Write equations representing these two reactions.
(b) A student placed a mixture of BaO and CaO of combined mass 4.88 g in a 1.46-L fl ask containing carbon dioxide gas at 35°C and 746 mmHg. After the reactions were complete, she found that the CO 2 pressure had dropped to 252 mmHg. Calculate the percent composition by mass of the mixture. Assume volumes of the solids are negligible.