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# Reaction Rate Investigation

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Introduction

Reaction Rate Investigation- Introduction- Background Information- � The reaction rate is the rate of which the reactant reacts with the reactor. � We will measure the rate of reaction by measuring the volume of gas let off by the reaction. � In order to find the average rate I will use the equation below. Aim- The aim of this investigation is to find how the surface area effects the reaction rate in the reaction between calcium chloride and hydrochloric acid. Hypothesis- I think that with a greater surface area(smaller particles) the acid will react quicker. I think this because of the collision theory. In the collision theory it states that in order for two substances to react together they must collide with each other and they must have enough energy. ...read more.

Middle

and small(large chips) surface areas � 1 mol l-1 of hydrochloric acid Method- 1. Set up the apparatus as shown in the diagram. 2. Break the magnesium (Mg) into small pieces. 3. With a 25 ml graduated cylinder, measure out 5 ml of 1 mol l-1 hydrochloric acid(HCL). 4. Place the HCL into the test tube, while starting the stop watch. 5. Put the stopper on directly after you add the HCL 6. Collect the gas in the 100 ml graduated cylinder whit the tube form the side of the test tube. 7. Record the volume of as given off ever 20 seconds until it stops. Results Raw data- Attached in Appendix I Calculations- Attached as Appendix II(written by hand) ...read more.

Conclusion

Problems with the method- � Lost gas in the being form not sealing the tube fast enough Suggestions to improve � Look into better methods to keep gar from escaping. What is a possible related investigation?- � Choosing a different substance to react with HCL than the calcium carbonate. Appendixes- Appendix I- Full results Time/ seconds Volume of Gas/ cm3 Small surface area Medium surface area Large surface area 1 2 1 2 1 2 0 0 0 0 0 0 0 20 13 13.5 21 19 50 46 40 18 19 36 36 87 85 60 22 23 53 54 100+ 100+ 80 24 28 69 74 100 26 32 83 89 120 28 35 97 98.5 140 30 38.5 100+ 100+ 160 32 42 180 34 45 200 36 48.5 220 38 52 240 39 54.5 260 41 58 280 42 60.5 300 43 62.5 Chemistry Investigation Chemistry Investigation ...read more.

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