Chemical Decomposition of Calcium Carbonate and Lime: Sources, Properties, and Reactions, Schemes and Mind Maps of Chemistry

Download Chemical Decomposition of Calcium Carbonate and Lime: Sources, Properties, and Reactions and more Schemes and Mind Maps Chemistry in PDF only on Docsity! Decomposition Reactions L.O: To use scientific terms and simple models to show chemical processes. Carbonates Shells Limestone Law of conservation of mass The law of conservation of mass states that in a chemical reaction mass is neither created nor destroyed. Choose your task 1. Give two natural sources of calcium carbonate: a. a living source b. a source from rock 2. What is lime? How is it made? 3. Both calcium carbonate and lime are used to reduce acidity. Give an example for each substance. Look at the experiment on page number 155 of your science textbook. What safety precautions should be taken during this experiment? Describe the changes that you would expect to see during this experiment. 1. Write a word equation for the formation of lime water. 2. Draw a circle diagram for the thermal decomposition step and use it to explain the mass change during the process. Check Your answers 1. A.shellfish, Oysters, snail shell, egg shell B. Chalk, marble, limestone, 2. Lime is calcium oxide. It is made by heating calcium carbonate. 3. Calcium carbonate is a remedy for indigestion. Lime is added to salt and water to reduce acidity. Safety precautions: Clamp tightly but do not break glass. Do not touch hot glass. The delivery tube should be secure. Do not overheat one place on the test tube. Point away from the faces. Use goggles to protect eyes. Take care not to break Delivery tube. Green powder of copper carbonate turns black. Colour less limewater turns cloudy 1. Calcium oxide +water → calcium hydroxide