How could we make this reaction happen more quickly?

What does the M after a concentration value stand for?

Which is the highest concentration?

The major theory of reaction rate is called

When surface area is decreased the rate of reaction...

How does a catalyst work in speeding up a reaction?

Why does a higher concentration increase the rate of reaction?

The ______________is required to break the bonds of the reactants.

What factors can affect the value of the activation energy of a reaction?

Grinding a effervescent tablet into powder increases the rate of reaction due to increased

A liquid X reacts with solid Y to form a gas.

Which two diagrams show suitable methods for investigating the rate (speed) of the reaction?

An experiment, S, is carried out to measure the volume of hydrogen produced when excess dilute sulfuric acid is added to zinc.

A second experiment, T, is carried out using the same mass of zinc but under different conditions.

The results of the two experiments are shown.

Which changes in the conditions between experiments S and T give curve T?

Magnesium is reacted with a dilute acid. The hydrogen gas is collected and its volume measured. The results are shown on the graph.

Between which times was the reaction fastest?

The effect of temperature on the rate of the reaction between marble chips and hydrochloric acid can be investigated by measuring the production of carbon dioxide.

Which item of equipment is not required for the investigation?

The diagram shows four experiments in which equal volumes of aqueous acid (all in an excess)

are added to equal masses of metal. Both acids have the same concentration.

In which experiment has the metal completely reacted in the shortest time?

The diagram shows apparatus being used to demonstrate how the rate of a chemical reaction changes with temperature.

Which statement must be correct?

Which of the following changes, DECREASES the rate of the reaction between magnesium and dilute hydrochloric acid?

1 - diluting the acid

2 - using larger pieces of magnesium

3 - cooling the mixture

Powdered marble reacts with hydrochloric acid using the apparatus shown. The gas syringe fills in 36 seconds.

The experiment is repeated using marble chips in place of powdered marble.

How long does it take to fill the gas syringe in this experiment?

A student investigates the rate of reaction between marble chips and hydrochloric acid.

The mass of the reaction flask is measured.

The graph shows the results of two experiments, P and Q.

Which change explains the difference between P and Q?

The rate of a reaction depends on temperature, concentration, particle size and catalysts.

Which statement is not correct?

Which changes decrease the rate of reaction between magnesium and air?

1 heating the magnesium to a higher temperature

2 using a higher proportion of oxygen in the air

3 using magnesium ribbon instead of powdered magnesium

Which graph shows the effect of increasing temperature on the rate of reaction of calcium carbonate with dilute hydrochloric acid?

In separate experiments, a catalyst is added to a reaction mixture and the temperature of the mixture is decreased.

What are the effects of these changes on the rate of the reaction?

________ is the measure of how much area of an

object is exposed.

A ______ is a substance that speeds up the rate of a

chemical reaction without being used up in the reaction itself.

Adding ______ will increase the rate of reaction because

this causes the particles of the reactants move more quickly, resulting in more collisions and more _________.

Grains of sugar (powder sugar) have a greater _______ than a solid cube of

sugar, so will dissolve quicker in water.

What is the activation energy?

How do catalysts increase the rate of reaction?