The Effect of Increasing or Decreasing the Concentration of HCL on the Speed of Reaction between HCl and CaCO3
Coursework
HCl + calcium carbonate ® calcium chloride + carbon dioxide + water.
HCl(aq) + CaCO3(s) [IMAGE]CaCl2(aq) + CO2(g) + H2O(l)
Aim
The aim is to investigate the effect that increasing or decreasing the
concentration of the HCL has on the speed of reaction, between HCl +
CaCO3. We will determine the speed/ rate of reaction by measuring the
amount of CO2 given off in a set time.
Equipment
Ÿ Tub of water
Ÿ 2 measuring cylinders
Ÿ 3 test tubes
Ÿ Test tube rack
Ÿ Top pan balance
Ÿ Stand + clamp
Ÿ Spatula
Ÿ Piece of card
Ÿ Delivery tube
Method
First I will prepare the experiment by collecting all of the necessary
equipment and preparing it. Then I will measure out the correct
amounts of HCL and CaCO3(s) using a measuring cylinder for the HCL
and the scales to measure the CaCO3(s) . These will be 20ml of HCL
and 50g of CaCO3(s). Ounce I have done this I will fill the measuring
cylinder with water, turn it up side down in the tub, making sure
there are no air bubbles present and hold it up using the stand and
clamp. Next I will slide the delivery tube up into the measuring
cylinder. Finally I will use the piece of card to drop the CaCO3(s)
into the test tube of HCL and secure the end of the delivery tube
onto the top of the test tube so it can start to collect CO2, which
will displace the water revealing the amount of CO2 given of from the
reaction. Once every 30 seconds after this I will record the amount of
CO2 and put these results into a table.
Fair Test
I feel that having a fair test is very important in order to obtain
useful and accurate results.