CH C14 Rate of Reaction

This is an experimental set-up to investigate the rate of reaction of a chemical reaction.
The purpose of the cotton wool is to prevent loss of ​ (a)   due to ​ (b)   ​.

This is an experimental set-up to investigate the rate of reaction of a chemical reaction.
The reason to tie a thread to the test tube containing magnesium ribbon is to topple the test tube after the conical flask has been ​ (a)   . This is to prevent the ​ (b)   due to the escape of ​ (c)   gas.

In order for a reaction to occur and products formed, reactant particles must ​ (a)   with energy equal or greater than the ​ (b)   energy.

Activation energy is the ​ (a)   amount of energy that reactant particles must possess in order for a ​ (b)   to occur.

Collision that possess energy equal or more than activation energy is called ​ (a)   .

Explain why does higher temperature lead to faster rate of reaction.
1. At high temperature, reacting particles have more ​ (a)   .

2. More particles posses energy equal to or ​ (b)   the ​ (c)   .

3. There is higher ​ (d)   of ​ ​ (e)   .

4. Hence, faster rate if reaction.

Explain why does higher concentration of chemicals lead to faster rate of reaction.

1. At high concentration, there are more reacting particles​ (a)   .

2. There is higher ​ (b)   of ​​ (c)   .

3. Hence faster rate of reaction.

Higher frequency of effective collision is the same as ​ (a)   effective collisions​ (b)   .

For solid chemical, ​ (a)   form has a larger surface area than​ (b)   form.

• powder
• granule

Powdered chemical can react faster than chemical in granular form. This is because:

1. 1. Powdered chemical has​ (a)   particle size.

2. 2. Hence it has ​​​large ​ (b)   .

3. 3. There are (c)   surfaces for reacting particles to collide.

4. 4. There are more effective collisions​ (d)   .