he rate of reaction increases as the temperature increases. Which of the following statements provides the best explanation for this?
The rate of reaction increases as the temperature increases because at higher temperatures the particles have more energy, move faster and collide more often.
1 of 6
Which of the following statements about collisions is correct?
Reactions can happen if the colliding particles have enough energy.
2 of 6
Reactions eventually stop. What is generally the reason for this?
Reactions stop when one or more of the reactants is used up.
3 of 6
In a reaction with hydrochloric acid, powdered magnesium reacts faster than the same mass of magnesium ribbon. Why is this?
Powdered magnesium reacts faster than magnesium ribbon because it has a bigger surface area.
4 of 6
Marble reacts with hydrochloric acid to produce calcium chloride, water and carbon dioxide. In which of these mixtures is the rate of reaction likely to be the greatest?
Powdered marble at a high temperature will react faster than marble chips or powder at a lower temperature.
5 of 6
Manganese dioxide is a black powder that catalyses the breakdown of hydrogen peroxide to water and oxygen. Which of the following statements is correct?
If manganese dioxide is acting as a catalyst, its mass will stay the same during the reaction.
6 of 6
Other cards in this set
Card 2
Front
Which of the following statements about collisions is correct?
Back
Reactions can happen if the colliding particles have enough energy.
Card 3
Front
Reactions eventually stop. What is generally the reason for this?
Back
Card 4
Front
In a reaction with hydrochloric acid, powdered magnesium reacts faster than the same mass of magnesium ribbon. Why is this?
Back
Card 5
Front
Marble reacts with hydrochloric acid to produce calcium chloride, water and carbon dioxide. In which of these mixtures is the rate of reaction likely to be the greatest?
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