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WorksheetsUnit 1 Rates of Reaction
Total questions: 10
Worksheet time: 16mins
If 5cm3 of gas is produced in 20 secs what is the average rate of reaction?
5cm3s-1
0.25cm3s-1
4cm3s-1
Which would not speed up a chemical reaction?
Using a large beaker
Increasing the concentration
Decreasing particle size
adding a catalyst
Which is to true true of catalysts?
They speed up a chemical reaction
They can be used over and over again
They change during the chemical reaction
Enzymes are biological catalysts
What can be said about the green line?
it is a faster rate of reaction
It produces same volume of product as red line
Half the volume of reactants has been used
Which would have the slowest rate of reaction
Magnesium ribbon 1M HCl at 20 degrees
Magnesium powder 1M HCl at 20degrees
Magnesium ribbon 0.5M HCl at 10degrees
Magnesium powder 0.5M HCl at 10degrees
Increasing the temperature increases the rate of reaction because ....
There is more particles so more collisions
There is larger surface area so more collisions
Particles have more kinetic energy so more collisions
why is the reaction fastest at the start ?
The reactants are in their greatest concentration
this statement is untrue the reaction is same rate through out whole reaction
Which statement is true
Large logs will burn faster than wood chips
500mg paracetamol will work faster than 200mg
Cars take longer to start on a warm day
A catalyst will have no effect on a reaction rate
which will have fastest rate of reaction.
Zinc strips 0.5 M HCL
Zinc powder 0.25M HCL
Zinc powder 0.5 M HCl
Zinc strips 0.25 M HCl
Which will increase the rate of a reaction?
Increasing the beaker volume
Lowering the temperature
using smaller pieces of solid
diltuing a solution
