An Experiment to Find Out How Much Gas is Given Off When Hydrochloric Acid and Marble Chips React

An Experiment to Find Out How Much Gas is Given Off When Hydrochloric Acid and Marble Chips React

Aim

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The aim of this experiment is to find out how much gas is given off by

marble chips when they react with hydrochloric acid. This will tell me

if the concentration of hydrochloric acid affects the speed of

reaction.

Variables

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I could change: the temperature, the percentage of hydrochloric acid,

the number of marble chips, or the size of the marble chips.

I will change the percentage of hydrochloric acid there is for the

marble chips to react with.

I will keep the temperature, the number of marble chips, and the size

of the marble chips the same. I will do all of the experiment on the

same day so that the temperature will be the same. If the temperature

increases the reaction would happen quicker, because the particles

would move around faster, so there would be more collisions. If the

temperature decreases the reaction would be slower, because the

particles would have less energy, and move slower. To keep the amount,

and the size of the marble chips the same, I will count out the number

of marble chips, and I will only pick chips of similar size. The more

marble chips there are and the smaller the size of the marble chips,

the more surface area there would be, so the quicker the reaction, and

there would be more gas produced. I will do this so that the

experiment is fair.

I could measure the rate of reaction by measuring how fast the

products are formed, or I could measure how fast the reactants are

used up. For this experiment I will measure the rate of reaction by

measuring how fast the products are formed, measuring the volume of

the gas given off over a certain amount of time. This would be more

accurate, because it would be easier to measure.

Fair Test

To make it a fair test, I will measure the amount of gas given off