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Find out how fast the rate of reaction is in marble chips and hydrochloric acid.

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Introduction

Liz Elliott Rates of reaction. Marble chips and Hydrochloric acid. Aim: In this experiment we are trying to find out how fast the rate of reaction is in marble chips and hydrochloric acid. Prelim: For our preliminary experiment we did three different types of experiments for us to see. Method 1) First, he used a measuring cylinder in water connected to a tube connected to a conical flask with the marble chips and acid inside it. The aim was to see the gas bubbles in the measuring cylinder. Method 2) Our second method was to use a gas syringe connected to a conical flask. The aim was for the gas to push the syringe up and measure the amount it had moved every 10 seconds. Method 3) In this experiment we weighed the marble chips and acid on a digital balance and then weighed it again after the reaction had taken place through the cotton wool. These are the results of the three preliminary results. Method 2 worked best because it had the most varied results compared to the other two. ...read more.

Middle

This makes collisions between the reactant particles more likely. Therefore there will be more collisions per second and as a consequence, more particles reacting per second. In other words, the rate of the reaction is increased. Prediction: I predict that the higher the temperature, the more reaction there will be because the higher temperature will make the particles collide more frequently within the 60 seconds we are doing each experiment in. We also want to see how a low temperature would affect our reaction. I predict this would be a slow reaction as the particles would have less energy to collide, therefore giving us a weak reaction. Equipment: o Eye goggles o Gas syringe o Marble chips (approx 2 grams per experiment) o Hydrochloric acid - 10cm� (2 Molar) o Water o Conical flask o Bung and tube o Stand o Measuring cylinder o Bunsen burner o Gauze o Heat proof mat o Thermometer o Boiling tube Method: (See prelim method 2) I am going to experiment to find out the effect that temperature has on the reaction between hydrochloric acid and marble chips. ...read more.

Conclusion

36 45 53 0 2.01 0 8 16 25 34 41 47.5 0 2.00 0 11 22.5 26.5 47 59 69.5 Averages: Temp (0�c) Mass Before (g) 0 10 20 30 40 50 60 50 2.01 0 19.5 37.5 51.5 63.5 73.5 85 40 2.00 0 16.5 32 43.5 54.5 62 69.5 30 1.99 0 14.5 28.5 40.5 52 60.5 73 20 2.00 0 11 23 34 40 55.5 63.5 10 2.00 0 16 30 43 49.5 60 74.5 0 2.00 0 9.5 19 29.5 39 48.5 56.5 Conclusion: In this experiment, the marble chips with the higher temperature acid reacted the quickest. The heaviest chips generally were also the quickest. This shows that the higher mass of marble chips and higher temperature of hydrochloric acid, the faster the reaction will take place. Evaluation: I think I could have improved this experiment by making it more of a fair test by having the exact mass of marble chips and exact surface area for each experiment. Some of the chips were slightly crushed which increases the surface area and speeds up the reaction making a huge difference. Apart from this, I think the experiment went fairly well. ...read more.

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