How changing acid concentration changes the rate of reaction.

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How changing the concentration changes the rate of reaction.

Introduction

We are going to look at the following factors during this investigation:

Why altering rate could be an advantage

2 Good ideas to control the rate of reactions

3 Briefly mention the factors that can change the rate of reaction such as: -

Temperature

Surface Area

Catalyst

Concentration

I am going to find out if changing the concentration of nitric acid in water and see if it has any effect on changing the rate of which precipitate is formed when reacts with sodium thiosulphate.

Prediction

I think that a faster reaction will happen with a higher acid concentration as there will be more successful collisions with sodium thiosulphate, which will result in a faster reaction because the product will be produced quicker.
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Apparatus

Conical Flask

2 Beakers

3 Measuring Cylinders

Paper with a black cross on

Stopwatch

Nitric Acid

Sodium Thiosulphate

Water Safety Glasses

Method

For my experiment I will measure out 25cm³ of Sodium Thiosulphate and put it in a conical flask. I will put the flask on top of a piece of paper that has a black cross drawn on it. I will then measure 15cm³ of Nitric Acid and add this to the Sodium Thiosulphate in the conical flask. The two should react together to ...

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