Science rates of reaction revision cards S2 By AM 0.0 / 5 ? ScienceRates of reactionYears 7-9 (KS3)None Created by: Anika mCreated on: 05-12-22 19:51 Name 3 signs of a chemical reaction. Colour change, temperature change and change in smell. 1 of 15 Write the WORD equation for methane reacting with oxygen to make carbon dioxide and water. Methane + Oxygen —> carbon dioxide and water 2 of 15 What is the formula for Carbon dioxide? CO2 3 of 15 What effect does concentration have on a chemical reaction? When the concentration increased the rate of reaction increases. 4 of 15 Explain why the concentration increases the rate of reaction. It increases the rate of reaction because there are more collisions with the particles. 5 of 15 What effect does temperature have on a chemical reaction? Temperature increases the the rate of reaction. 6 of 15 Why does temperature increase the rate of reaction? High temperature causes the particles to collide more (Resulting in increase of the rate of reaction). 7 of 15 What effect does particle size have on chemical reactions? Decreasing particle size increases surface area. 8 of 15 Explain how the particle size has an impact on chemical reactions. Decreasing particle size gives more surface area meaning more space for particles to collide. 9 of 15 What effect does catalysts have on chemical reactions? Speeds up a reaction 10 of 15 What is electrolysis? Electrolysis is a process that uses the power of electricity to separate compounds. 11 of 15 What do you get if you electrolyse water? Hydrogen and water. 12 of 15 Name 3 uses for electrolysis in industry? Hydrogen fuel, electroplating and purifying copper salts. 13 of 15 What is a chemical cell? (Or Electrochemical cells) A chemical cell is to transfer energy by electricity. 14 of 15 Describe how batteries work. Batteries store chemical energy and converts it to electrical energy. 15 of 15
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