Temperature's Effect on the Rate of a Chemical Change

Temperature's Effect on the Rate of a Chemical Change

Introduction

This investigation is about how temperature can affect the rate of

chemical change of calcium carbonate in the form of solid marble chips

reacting with dilute hydrochloric acid. During the investigation I

will try to find out how by changing the temperature of the solvent

this will affect the rate of chemical change of calcium carbonate and

hydrochloric acid.

For every experiment I do, I will measure the amount of carbon dioxide

given off from the reaction because I know there will be carbon

dioxide given off because of the equation:

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Metal Carbonate + acid Salt + Water + Carbon dioxide

With that information I can work out the rate of chemical change by

using the formula:

RATE = volume of CO2(g) released

Time

There are a number of factors which can affect the rate of chemical

change. These factors are:

§ The temperature

§ The concentration of the acid

§ The surface area of the marble chips

§ A different solvent

§ Different volumes of the solvent

The factor that I am going to investigate is how temperature affects

the rate of chemical change of Hydrochloric acid and Calcium Carbonate

(marble chips). I will be keeping all of the factors above constant

apart from temperature which I will be changing.

Science Theory

In the experiment I am changing the temperature of the solvent and

noting down how much gas is released. As I raise the temperature due

to kinetic theory the hydrochloric acid particles will move faster and

faster as they have more energy and therefore will collide more times

with the Calcium Carbonate particles with more intensity and weakening

and breaking the bonds faster. Kinetic theory is only for liquids,

gases and solutions and not for solids. That is why solids cannot

react with each other. So the hydrochloric acid particles are hitting

the Calcium Carbonate particles as the Calcium Carbonate particles do