An investigation to find out how the concentration of acid affects the rate of reaction between hydrochloric acid (HCl) and limestone (CaCo3)

Authors Avatar
An investigation to find out how the concentration of acid affects the rate of reaction between hydrochloric acid (HCl) and limestone (CaCo3)

Aim

My aim for this experiment is to find out if the concentration, which is the variable I am changing, affects the rate of reaction between CaCO3 & HCl.

Prediction

My prediction is that if the concentration of the acid increases there will be an increase in the rate of reaction for example the highest concentration will have the fastest reaction time.

I used a preliminary test to help in the prediction. I went and prepared marble chips and concentrated acid, we tried the experiment, the results was clear that as in a few seconds it was almost finished. When we used very dilute acid it took so long for it to react and the amount of bubbles were much less than the first one.

By using the results I can make the prediction of that, the rate of reaction is affected by concentration.

Hypothesis

If the concentration of an acid increases then the rate of reaction will also increase. When the acid has a high concentration that means in that solution, compared to a dilute one there are more particles available to react with therefore the amount of times they will collide with each other is more. I got this information from GCSE chemistry book and my own knowledge

Introduction

There are many different factors, which affect the rate of reaction. Below are most of the known factors, which affect the rate of a reaction:

. The size of the particles of a solid reactant.

2. The concentration of the reactants solution.
Join now!


3. The temperature at which reactants undergo reaction.

Particle size

The reaction between calcium carbonate and dilute hydrochloric acid is used to prepare CO2. Varying the size of the Calcium Carbonate can make this reaction have a different rate. We could try using one single lump or powder and see which reaction would take longer. On a separate sheet of graph paper is an expected graph for three different sized chips of CaCO3 reaction with the HCl.

One point to note is that the factors do not effect the amount produced but only speed ...

This is a preview of the whole essay