To Investigate the Rate of Reaction Between Calcium Carbonate and Hydrochloric Acid

2233 Words Mar 12th, 2007 9 Pages
Aim: To investigate the rate of reaction between Calcium Carbonate and Hydrochloric Acid.

Just from looking at the aim of the investigation I already know that a salt would be formed because a carbonate with an acid forms a salt. In this investigation the substance that is formed is Calcium Chloride, Water and Carbon Dioxide. The symbol equation for this is:
CaCo3  Ca2+ + Co32-
Hcl  H+ + Cl-
Add these all together to get
CaCO3(s) + 2H+(aq) --> Ca++(aq) + H2O + CO2(g)

The rate of reaction is just the speed at which the substances on the left side of equation turn into the substances on the right side. The way we measured the rate of reaction today was measuring the how quickly carbon dioxide gas was produced in each
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it doesn't increase the amount of energy they have).

Method:

First of all I will set up my equipment.
•I will get a conical glass that will have a bung placed on top because this will stop anything from entering and leaving that may affect the investigation. A tube will then go from the bung to the bee hive shelf; this will be under the water. On top of this will be a measuring tube that will be full of water because when the gas bubbles come up the water will decrease, giving me the amount of gas given off.
•Then weight 2.0g of medium sized marble chip and 25 ml of substance.
•Prepare to start stopwatch put marble chips in with acid & put bung on conical flask whilst starting stopwatch every minute until 8 minutes starting from 0s take a measurement of how much air there is in measuring cylinder (cm3) When finished this with the first concentration of acid clean out the conical flask and refill the measuring cylinder & repeat experiment.
During this investigation I will wear goggles due to health and safety rules. I will also record my results into a table when doing the experiment. With the results I will record them into a scatter graph therefore I can compare the results. I will then section the graphs into 4, every 2 minutes so I can compare what is happening in each section and why. Therefore I can understand what is happening with
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