Investigation to show the effect of different concentrations of Dilute Sulphuric Acid on Zinc

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Investigation to show the effect of different concentrations of Dilute
Sulphuric Acid on Zinc

Aim

To find the effect that different concentrations of dilute sulphuric acid have on the rate of reaction between the acid and zinc.

Chemical Equation

Zn + H2SO4 H2 + ZnSO4

How my investigation is a fair test

In this experiment only one factor is to be changed to make it a fair test, the concentration of the sulphuric acid, while all others must remain constant. I will also use the same amount of zinc each time, use the same conical flask and gas syringe.

Background
==========

This experiment is showing the effect on the rate of reaction between zinc and sulphuric acid if you change the concentration.

To react, reactants must collide with enough energy to result in successful collisions. If you increase the concentration, then that means that there are more particles in the same volume to react.
Therefore, there will be more successful collisions per second. If there are more successful reactions, therefore the rate is also increased. When there is a high concentration,

the reactants have more successful collisions per second; therefore the rate of reaction is quicker.

When there is a low concentration,

The reactants have less successful collisions per second,

Therefore the rate of reaction is slower.

Therefore, if the concentration is doubled, the number of particles is doubled, as is the number of collisions, resulting in the rate of reaction also being doubled.

Prediction
==========

I predict that as the concentration increases so will the rate of reaction. I also predict that when the concentration doubles, so will the rate of reaction.

Apparatus
=========

1.) Gas Syringe 100cm³ - I chose this as it is easy to measure the volume of gas collected with this.

2.) Conical flask 150cm³ - I chose this, as it is fairly precise to measure the concentrations of the dilute sulphuric acid.

3.) Measuring cylinder 50cm³ - I chose this, as it is fairly precise to measure the concentrations of the dilute sulphuric acid.

4.) 5g Zinc granules

5.) Dilute Sulphuric Acid 100/dm³

6.) Water

7.) Copper Sulphate solution

8.) Balance – I chose this, as it is very precise (it measure to 2 decimal place)

9.) Timer – I chose this as it is very precise (it measures to 2 decimal place)

Method
======

1.) Make up 50cm³ of the following concentrations:

ACID : WATER (cm³)

10 : 40
20 : 30
30 : 20
40 : 10
50 : 0

GRAPH

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