How can you measure the rate (speed) of a reaction?
If you measure the amount of gas given off and measure the time it takes, you can tell the rate of reaction.
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What does the rate of reaction depend on?
The frequency of collisions between particles and the energy with which particles collide.
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What factors affect the rate of reaction?
Increased temperature, increased concentration of dissolved reactants, and increased pressure of gaseous reactants, increased surface area of solid reactants and use of catalyst.
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How does surface area affect rate of reaction?
The smaller the surface area, the faster the rate of reaction.
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What are catalysts?
Catalysts are substances that change the rate of reaction without being used up in the reaction. They never produce more product - they just produce the same amount more quickly.
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What is percentage yield?
The percentage yield of a chemical reaction shows how much product was actually made compared with the amount of product that was expected.
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