# Rate Of Reaction

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Title The effect of surface area on the rate of reaction of magnesium and hydrochloric acid Research Question How can the surface area affect the rate of reaction of magnesium and hydrochloric acid? Hypothesis In a chemical reaction, there are a few factors that affect the rate of reaction such as temperature, concentration of reactant, and surface area of reactant. These factors will increase or decrease the rate of reaction. The hypothesis that can be derived is that the higher the surface area of reactant the rate of reaction will increase. Variable Independent variable : types of magnesium (magnesium strips and magnesium powder). Dependent variable : rate of reaction. Constant variable : temperature, concentration of hydrochloric acid and volume of hydrochloric acid. Apparatus 1 conical flask, 1 stopper, 1 connecting tube, 1 burette, 1 basin, 1 retort stands, 1 stopwatch, 1 digital weighing machine, 1 measuring cylinder Materials 0.02 M hydrochloric acid, magnesium strips, powder strips, distilled water, water Methodology 1. Prepare the apparatus according to diagram A. 2. Prepare 100 cm3 of 0.2 M hydrochloric acid by mixing 10 cm3 of 2 M hydrochloric acid with 90 cm3 of distilled water. 3. Fill the conical flask with 50 cm3 of 0.2 M hydrochloric acid. 4. Weight up 0.2 g of magnesium strips. 5. Put that magnesium strips into the conical flask which contains 50 cm3 of 0.2 M hydrochloric acid. 6. Immediately close the conical flask with stopper and start stopwatch. 7. Record the volume of gas in burette in every 30 seconds for 5 minutes. 8. Tabulate the reading obtained from the reaction. 9. Repeat the experiment by using 0.2 g magnesium powder. 10. Plot a graph for both experiments. 11. Calculate the rate of reaction for both experiments from its respective graph. Compare which reactions have