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Chemistry (P2)

Rates of Reaction and Energy Changes

QuestionAnswer
Describe an experiment to measure how surface area affects rate (HCl and marble chips) Place HCl with marble chips in flask with a gas syringe connected, measure volume of gas produced using a gas syringe and in regular time intervals, repeat exactly the same but with chips more crushed up, then repeat with same mass of powdered chalk
How can you measure rate of reaction when precipitate is formed? Put black cross below beaker containing one reactant, time how long it takes for cross to disappear after second reactant is added
How do we determine the rate of a reaction by change in mass? Use mass balance, as gas is released lost mass is measured on the balance
How do we determine the rate of a reaction by volume of gas given off? Use gas syringe, more gas given off at set time interval means faster reaction
What is needed for reactions to occur? Particle collision
How are rates of reaction increased? When freq and/or energy of these collisions are increased
Created by: user-1956972
 

 



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