How Concentration Increases the Rate of Reaction between Magnesium & Hydrochloric Acid _Mai Lynn Voldum 3.u._ Aim: To investigate how the concentration of hydrochloric acid affects the rate of reaction between magnesium and hydrochloric acid using the mean of collecting the amount of hydrogen released. Variables: Controlled – Temperature of reactants, amount of reactants & atmospheric pressure. Hypothesis: I predict that increasing the concentration of hydrochloric acid will shorten the amount of time taken for the maximum amount of hydrogen to be collected indicating that the rate of reaction had increased. This is because increasing the concentration ensures a higher level of particles in a solution increasing the chances of successful collisions. Method: Fill a 100mL conical flask with 10cm3 of 1M hydrochloric acid. Cut a strip of 2cm length out of magnesium ribbon and have it ready. Have a stop watch ready. Put a thermometer in the flask and place the flask in a water bath and heat it up to 25°C. Quickly taken it out of the bath, add the magnesium strip and close up the flask with a bung that is inserted with a collecting tube that is connected to a tube connected to a gas syringe lying horizontally on the bench. Start timing and record the amount of hydrogen collected in the syringe every 15 seconds in the table. As soon as the amount of hydrogen collected stops increasing, stop the clock. Wash out the apparatus and repeat with 2M and 0.5M acid. Repeat the entire method. Apparatus: 1M, 2M and 0.5M Hydrochloric acid Magnesium ribbon Measuring cylinder ±1cm3 100mL conical flask ±1mL Bung Collecting tube Tube Gas syringe Stopwatch ±1 second Ruler ±0.1cm Thermometer ±1°C Bunsen burner Tripod Gauze mat Beaker Goggles Lab coat Conclusion: My results support my hypothesis that...