Rates of Reaction

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?

• A 1 and 3

• B 1 and 4

• C 2 and 3

• D 2 and

Tags

NGSS.HS-PS1-5

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?

• A Addition of a catalyst: Yes;

  The zinc is in large pieces, not powdered: Yes.

• B Addition of a catalyst: Yes;

  The zinc is in large pieces, not powdered: No.

• C Addition of a catalyst: No;

  The zinc is in large pieces, not powdered: Yes.

• D Addition of a catalyst: No;

  The zinc is in large pieces, not powdered: No.

Tags

NGSS.HS-PS1-5

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?

• A 0 and 1 minute

• B 1 and 2 minutes

• C 2 and 3 minutes

• D 7 and 8 minutes

Tags

NGSS.HS-PS1-5

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?

• A condenser

• B gas syringe

• C stopclock

• D thermometer

Tags

NGSS.HS-PS1-5

P, Q, R and S are pieces of apparatus.

Which row describes the correct apparatus for the measurement made?

• A

• B

• C

• D

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?

• A

• B

• C

• D

Tags

NGSS.HS-PS1-5

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

Which statement must be correct?

• A The reaction is endothermic.

• B The reaction is exothermic.

• C The reaction produces a gas.

• D The reaction produces an acid.

Tags

NGSS.HS-PS1-5

A student was asked to measure the rate of reaction between dilute hydrochloric acid and marble chips at different temperatures. Some of the apparatus used is shown.

• A balance and pipette

• B balance and stopclock

• C beaker and stopclock

• D burette and pipette

Tags

NGSS.HS-PS1-5

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

• A 1 and 2 only.

• B 1 and 3 only

• C 2 and 3 only

• D 1, 2 and 3

Tags

NGSS.HS-PS1-5

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 9 seconds

• B 18 seconds

• C 36 seconds

• D 72 seconds

Tags

NGSS.HS-PS1-5