Marble Chips And HCL.

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Marble Chips And HCL

Safety- must always wear safety glasses and we should be very careful not to drop any acid.

Fair test- we must make sure that we use the same size, amount and

roughly the same mass of chips, this is because we want to keep the chips

roughly the same all the way through the experiment so that it will be a

fair test and the results we be in relation to each other, otherwise the

results will be completely different to what we will expect and it will

ruin the experiment. We must also take our readings at the same intervals

throughout the experiment i.e I will take a reading every fifteen seconds

for all of my experiments.

I predict that the more concentrated the acid the quicker the

reaction will take place, because the more concentrated the acid is then

it will make the chips react faster and more hydrogen will be given off in

a quicker time. The

smaller the stones are, the even quicker the reaction will happen, this is

because the acid has a smaller surface area to act upon.

Equipment- We will need a boiling tube, calcium carbonate chips, hydrochloric acid,

water, a stop watch, a gas syringe and a bung on the top of the boiling

tube with a delivery tube connected to the gas syringe. I will also need a stand and a clamp to hold on to the syringe.

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Method

When doing my experiments I will use the same

procedure throughout. Once

I have set up the apparatus I will measure out 5cm3 of acid in a measuring

tube and then pour it into a boiling tube.

Then I will be ready with the stop watch and then quickly drop in

the chips into the acid, push on the bung and and start the stop watch. This must all be done in a very short space of time.

From there, I must take the reading from the volume in

the gas syringe every fifteen seconds very accurately until it ...

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