The Effect Of Concentration On Rate Of Reaction

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The Effect on Concentration on Rate of Reaction
Year 10 Term 1 - Using Chemistry
Grace McKinlay
Year 10 Science Term 1 – Using Chemistry
Teacher – Ms. Roslyn Knight

Table of Contents
Background 1
Aim 3
Variables 3
Hypothesis 3
Materials 4
Risk Analysis 5
Method 6
Diagram 7
Discussion 12
Conclusion 12
Definitions of Essential Vocabulary 13

Marble, or calcium carbonate, is a fairly insoluble compound with the chemical formula CaCO3. This compound has a carbonate ion, which has a charge of -2 and a calcium ion, which has a charge of +2. Calcium carbonate has a few forms including chalk and limestone. The main use of these two materials is in the making of concrete, which is used for many things including buildings. The rate of the reaction is the speed that the reaction takes place; therefore, by measuring the rate, the amount of time the reaction takes will be measured. Hydrochloric acid is a stronger acid that is found in digestive juices in the human stomach and is also used for cleaning metals before they are coated. When you mix a strong acid like HCl with any carbonate you will have a chemical reaction in which CO2 gas is released. This means that it will fizz indicating a chemical reaction. These two elements can react with hydrochloric acid to yield carbon dioxide, calcium chloride and water. The chemical reaction equation for hydrochloric acid and calcium carbonate is:

2HCl + CaCO3 → CaCl2 + H2O + CO2

Things that will affect the reaction
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