Investigating How the Concentration of Hydrochloric Acid Affects the Speed of the Reaction with Marble Chips

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Investigating How the Concentration of Hydrochloric Acid Affects the Speed of the Reaction with Marble Chips

Introduction

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There are many factors that will affect the rate of reaction between

hydrochloric acid and calcium carbonate. Some of them are as follows:

* Temperature - If the temperature is higher, then the molecules in

the solution have more energy, causing them to move around more

which would mean they would react faster.

* The surface area of the calcium carbonate - If the calcium

carbonate is in a sphere shape, then there is not as much surface

area than there would be if it was in a flat cuboid shape or

perhaps in several different chips. The more surface area, the

more acid molecules touching the chips and so the rate of reaction

is increased.

* Whether or not there is a catalyst.

* The concentration of acid in the solution. The more acid there is,

then the more acid molecules there are to react with the calcium

carbonate.

I am going to find out if the concentration of hydrochloric acid in a

water solution affects the speed of reaction with the calcium

carbonate. I will use 5 different concentrations of acid to get more

and accurate results.

Prediction

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I predict that the more hydrochloric acid there is in the solution,

the faster the reaction will be.

I think this because if the solution is more concentrated, then there

are more acid molecules to react with the calcium carbonate, and so

the reaction will take place faster than if there were not as many

acid molecules to react with the chips. This is because if there are

more acid particles, then there are more of them constantly colliding

with (attacking) the calcium carbonate and breaking it up.

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