Chemistry Coursework GCSE Investigating rates of reactions
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Planning Aim I aim to investigate how temperature affects the rate of the reaction of Calcium carbonate and Hydrochloric acid. I have established that:- Calcium carbonate + Hydrochloric acid = Calcium chloride + Carbon dioxide +water This equation can also be stated using symbols :- Ca CO s + 2HCl ag = CaCl ag + H O l +CO Variables A variable is a factor which we can measure or control. There are several variables which I could change and study the effects of there changes. These are the following:- ...
more accurate readings and therefore more reliable results.

more accurate readings and therefore more reliable results.
Another alternative experiment involves the change in mass being measured every 10 seconds. The Carbon dioxide produced in the reaction escapes into the air. The cotton wool plug is there to stop acid spray from escaping. This method is more reliable because a top-pan balance is more accurate than using a measuring cylinder to take results from. Using a cotton wool plug would also eliminate the problem of leakage of gas at the beginning of the experiment, as the bung allowed.
HYPOTHESIS We can recognize four types of substances due to their structure: ionic, metallic, covalent, and molecular. If a given substance has a metallic luster, is malleable and ductile, is a good conductor of heat and electricity, and has high melting and boiling points, than it is supposed to...
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The following shows the collision theory used to explain the effect of temperature and concentration Prediction: In this investigation I expect to find as I increase the temperature the reaction will take place faster. This is because as the temperature increases, it gives more energy to the sodium thiosulphate and...
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Investigating Reaction Rates Problem: To investigate a factor which affects the rate of reaction between magnesium ribbon and hydrochloric acid. Initial Investigation: The reaction that takes place is Magnesium and hydrochloric acid. Magnesium + Hydrochloric Acid ?óÔé¼?¥?é?? Magnesium chloride + hydrogen Mg + HCl...
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Acid Limestone SC1 HF Planning We are going to investigate the factors that affect the rate of a chemical reaction. Input Variables of this investigation I could study are: Amount of Calcium Carbonate CaCO3 Temperature of Acid Concentration of Acid molarity Surface Area...
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Introduction: In this piece of coursework I will be attempting to discover what affects the digestion of starch. There are four main factors that affect the digestion of starch. 1. Temperature of the solution 2. PH of the solution 3. Surface area of the starch...
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