U1-1 - Rate of Reaction Flashcards
Use this to revise the Rate of Reaction topic, which is part of the Chemical Changes and Structure unit. This topic covers: factors which affect reaction rate, average rate calculations, monitoring rate experimentally and rate graphs.
Describes how quickly products are formed during a chemical reaction.
Reaction rate
The reaction is complete at point …
C.
The point in time when the reaction is complete (no more products formed).
End-point
Reaction rate can be increased by decreasing the…
particle size.
Reaction rate can be increased by ________ the concentration.
increasing
Reaction rate can be increased by ________ the temperature.
increasing
Reaction rate can be increased by adding a …
catalyst.
State the formula used to calculate average rate.
A substance that speeds up chemical reactions but can be recovered chemically unchanged at the end of the reaction.
Catalyst
Can be used to collect a soluble gas
Gas syringe
Reaction rate
Describes how quickly products are formed during a chemical reaction.
End-point
The point in time when the reaction is complete (no more products formed).
Catalyst
A substance that speeds up chemical reactions but can be recovered chemically unchanged at the end of the reaction.
Why does the reaction rate decrease as the reaction goes on?
The reactants are getting used up.
During a reaction, the mass of gas produced was measured in g. Time was measured in s.
Average rate will have units of …
g s-1.
If a reactant is ___________, adding more of it will not make more products.
in excess
During a reaction, the volume of gas produced was measured in cm3. Time was measured in min.
Average rate will have units of …
cm3 min-1.
Can be used to collect an insoluble gas
Inverted measuring cylinder (shown), gas syringe
This can be measured to monitor rate without collecting a gas
Mass (loss)
A reaction between zinc powder and sulfuric acid produced graph A.
Which graph will be produced if zinc lumps are used?
B
Reaction C was carried out using an excess of zinc and 1M sulfuric acid.
Which curve shows the reaction progress when 2M sulfuric acid was used?
A
