B. Hypothesis: C. INTRODUCTION: Carbon dioxide gas bubbled through limewater (Calcium hydroxide solution) produces a precipitate. The precipitate will dissolve if the concentration of carbon dioxide is high enough. D. AIM: To investigate E. SAFETY Learners should not taste any of the chemicals used. F. APPARATUS: 1. Two transparent bottles/test tubes 2. Calcium hydroxide 3. 500 ml of water 4. Spatula / plastic teaspoon 5. Drinking straw G. METHOD: 1. Leamers must work in groups of four Carbon dioxide (2) Limewater Limewa Milky​