Gwyneth Cooper
Quiz por , criado more than 1 year ago

Year 10 Science quiz about rates of reactions with a combustion focus

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Gwyneth Cooper
Criado por Gwyneth Cooper aproximadamente 6 anos atrás
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Rates of reactions

Questão 1 de 8

1

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For a chemical to take place, the particles must with enough energy and the right orientation to break the holding them together. Then the can rearrange themselves into new compounds.

Explicação

Questão 2 de 8

1

The rate of a reaction is the...

Selecione uma das seguintes:

  • Number of successful collisions per second

  • Number of particles that could react

  • Size of the container the reaction is in

  • Number of collisions that take place

Explicação

Questão 3 de 8

1

Which of these increase or decrease the rate of a reaction? (click as many as are needed - there are three factors listed in total)

Selecione uma ou mais das seguintes:

  • The temperature of the reactants

  • The weather outside

  • The concentration of the reactants

  • The quality of the reactants (that you bought them from a good shop)

  • The particle size

  • The size of the container

Explicação

Questão 4 de 8

1

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Temperature is a measure of the energy that the particles have. The more heat energy particles have, the they move. This means that are more likely to have enough energy to break the in the reactants, so there will be more successful collisions per .

Explicação

Questão 5 de 8

1

What is concentration?

Selecione uma das seguintes:

  • It's the size of the container the reaction is in

  • It's the number of particles in a given volume or space

  • It's the number of collisions per second

Explicação

Questão 6 de 8

1

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the concentration increases the rate of the . Because there are more in the same space, there will be more collisions just because they're crowded together more. Because there are more collisions, the of the reaction will be faster.

Explicação

Questão 7 de 8

1

Which of these will react at the fastest rate?

Selecione uma das seguintes:

  • Vinegar and baking soda chunks

  • Vinegar and a baking soda tablet

  • Vinegar and baking soda powder

  • Vinegar and a baking powder (baking soda mixed with citric acid) tablet

Explicação

Questão 8 de 8

1

Preencha os espaços em branco para completar o texto.

Decreasing the particle size the rate of the reaction. chunks have a small surface area so react only slowly, because only those particles on the outside are available for . Smaller pieces and powder have a surface area (for the same amount of reactant), and so more particles are available for collisions. Because more particles are available, there will be more collisions per second and therefore the rate of the will increase.

Explicação

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