1. Topic – Rate of reaction
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PiXL GetIT!
GCSE Chemistry
Topic – Rate of reaction   
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2. GetIT – Rate of reaction
Reactants  products If some reactant is left at the end of a reaction then the reactant was in excess If all the reactant is used up in the reaction then the reactant was limiting Rate of reaction can be calculating by measuring how much product is made or how much reactant is used

3. Match IT Reactant Reaction time Excess Product Limiting reactant
Time between the start of a reaction and its completion
Reaction time
Substance that is made in a chemical reaction
Excess
A measure of how much solid is dissolved in water
Product
A substance that speeds up a reaction without being used up. Lowers the activation energy
Limiting reactant
Substance that takes part in a chemical reaction
Concentration
The amount of product made ÷ time OR The amount of reactant used ÷ time
Surface area
Reactant that is completely used up in a reaction
Catalyst
A reactant that is not all used up in a reaction
Rate of reaction
The area of a solid that is in contact with other reactants

4. Match IT - Answers Reactant Reaction time Excess Product
Substance that takes part in a chemical reaction
Reaction time
Time between the start of a reaction and its completion
Excess
A reactant that is not all used up in a reaction
Product
Substance that is made in a chemical reaction
Limiting reactant
Reactant that is completely used up in a reaction
Concentration
A measure of how much solid is dissolved in water
Surface area
The area of a solid that is in contact with other reactants
Catalyst
A substance that speeds up a reaction without being used up. Lowers the activation energy
Rate of reaction
The amount of product made ÷ time OR The amount of reactant used ÷ time

5. Label IT Label the diagram, including the reactants and products.
Describe how this equipment could be used to monitor the rate of reaction.
List 3 ways to increase the rate of the reaction.

6. Label IT - Answers
Clamp
Measuring cylinder
Delivery tube
Conical flask
Product (gas)
Reactants

7. Label IT
Describe how this equipment could be used to monitor the rate of reaction.
Time how long it takes to collect a certain volume of gas
Measure how much gas in produced in a set amount of time
List 3 ways to increase the rate of the reaction.
Increase the concentration of the liquid reactant
Increase the surface area of the solid reactant
Increase the temperature
Add a catalyst

8. Calculate the rate of reaction between 0 and 10 seconds.
Label IT
Calculate the rate of reaction between 0 and 10 seconds.
Volume of gas produced/ cm3

9. ΔY = 40cm3 ΔX = 10s Label IT - Answers
Use the gradient of the line to find the rate over the first 1 seconds of the journey.
(Δ = difference)
rate = volume ÷ time
Draw a triangle under the line for the first 10 seconds
Find the volume (ΔY)
Find the time (ΔX)
Gradient = ΔY ÷ ΔX
Rate = 40cm3 ÷ 10s = 4cm3/s
Volume of gas produced/ cm3
ΔY = 40cm3
ΔX = 10s