Changing the rate of Reaction cGCSE

Which would make the reaction faster?

• Grinding up the reactants into a powder

• Keeping the reactants together as a lump

Which would make the reaction slower?

• Grinding up the reactants into a powder

• Keeping the reactants together as a lump

What effect does grinding up the reactants into a powder have on the rate of reaction?

• decreases the rate of reaction

• increases the rate of reaction

• makes no difference to the rate of reaction

What effect does heating the reactants up have on the rate of reaction?

• decreases the rate of reaction

• increases the rate of reaction

• makes no difference to the rate of reaction

Which would react faster?

• 5 grams of small marble chips

• 5 grams of large marble chips

• they would react at the same speed

What effect does cooling the reactants down have on the rate of reaction?

• decreases the rate of reaction

• increases the rate of reaction

• makes no difference to the rate of reaction

Which of these temperature changes will increase the rate of the reaction?

• raising the temperature

• lowing the temperature

• temperature makes no difference to the rate of reaction

Which of these temperature changes will decrease the rate of the reaction?

• raising the temperature

• lowing the temperature

• temperature makes no difference to the rate of reaction

Why does high temperature increase the rate of the reaction? Tick all the correct options

• the particles become ions

• the particles move faster

• the particles collide more often

• the particles change size

• the particles have more energy

Which of these will decrease the rate of the reaction?

• using a more concentrated liquid

• using a less concentrated liquid which is diluted

• concentration makes no difference to the rate of reaction