Factors affecting speed of reactions

Surface Area

Multiple Choice

Which of the following has a larger surface area?

• lump

• grains

Drag and Drop

The larger surface area of these ​

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pieces of solid results in ​

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frequency of ​

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collisions with the other reacting particles.

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smaller

higher

effective

lower

faster

energetic

bigger

Drag and Drop

This results in ​

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​

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​ ​

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​

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collision. Thus the speed of reaction is ​

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when smaller solid particles are used.

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higher

frequency

of

effective

faster

slower

energetic

lower

Temperature

Dropdown

Particle has ​

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speed at higher temperature. The particles also have ​

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average energy.

Drag and Drop

This results in ​

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​

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​ ​

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​

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collision. Thus the speed of reaction is ​

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at a higher temperature.

Drag these tiles and drop them in the correct blank above

higher

frequency

of

effective

faster

slower

energetic

lower

Concentration of solution

Labelling

Label which beaker has more particles in the same volume of solution, which beaker has the higher concentration

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Higher concentration

More particles in the same volume

Dropdown

When the concentration of a reactant is increased, there are ​

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particles in a given volume of solution. The particles are ​

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together.

Dropdown

As the particles are closer together, the ​

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of ​

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collisions ​

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, This results in a higher speed of reaction.

Pressure of gases

Dropdown

When the pressure of a gas is increased, there are ​

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space for the particles to move. The particles are ​

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together.

Dropdown

As the particles are closer together, the ​

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of ​

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collisions ​

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, This results in a higher speed of reaction.

Multiple Choice

A strip of magnesium metal is added to some hydrochloric acid. Which of the following will not increase the speed of the reaction?

• use magnesium powder instead of strip

• use an acid of higher concentration

• heat up the acid

• increase the pressure of the acid

Multiple Choice

In order to increase the speed of reaction, we can increase the pressure of ____ reactants.

• solid

• liquid

• gas

• aqueous

Multiple Choice

Only reactions that involve ___ will the speed of reaction be affected by pressure.

• solid

• liquid

• gas

• aqueous