Speed of Reaction Recap

We can measure the speed of reaction by measuring the

• time taken for a reaction to be completed

• volume of gas produced in a period of time

• mass of reactants remaining in a period of time

• mass of reactants remaining

The effect of temperature on the rate of the reaction between magnesium and sulfuric acid can be investigated by measuring the volume of gas produced. 

Which equipment is not required for this investigation?

• electronic balance

• gas syringe

• stopwatch

• thermometer

The graph shows how the total volume of a gas given off from a reaction changes with time. In which time interval is least volume of gas given off?

• A

• B

• C

• D

The mass of a mixture of carbonate and acid was measured at regular time intervals. A graph of the mass against time was plotted. Which curve was obtained?

• A

• B

• C

• D

2 g lump and 2 g of powdered zinc are added to equal volumes of sulfuric acid. The solid line shows volume of gas given off when the lump is used.

Which line is obtained for powdered zinc?

• A

• B

• C

• D

An increase in temperature causes the reacting particles to ......

• lose energy and move slower

• gain energy and move faster

• lose energy and move faster

• gain energy and move slower

Why does a higher concentration increase the rate of reaction?

• it increases the amount of reactants

• it lowers the activation energy

• it increases the energy of particle collisions

• it increases the frequency of particle collisions

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

• concentration

• surface area

• temperature

• reactants

Which factors increase the rate of a reaction?

• increasing temperature

• increasing concentration

• increasing surface area

• All of these

The solid line represents rate of volume of gas produced during an experiment. Which graph best represents the same experiment conducted at a lower temperature?

• A

• B

• C

• D