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I am going to investigate at which concentration of hydrochloric acid, marble breaks down fastest to make hydrogen.

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Introduction

Science Chemistry Investigation I am going to investigate at which concentration of hydrochloric acid, marble breaks down fastest to make hydrogen. The concentrations are measured in molars, we are a going to use 0.1 0.5, 1 and 2 molars. I am going to use ml of hydrochloric acid, of marble chips with a surface area and the temperature will be room temperature which is roughly 25 degrees. This can't be kept constant but it will not change much during the experiment. The amounts of acid and the size, amount and surface area of the marble chips will be kept the same. The time between readings will be kept the same, it will be 20 seconds, and the size of the conical flask will be kept the same. ...read more.

Middle

Readings are taken every 20 seconds until there are three results that are the same, and then the experiment is stopped. Same experiment will be carried out three times so that one set of average results and measurements can be used. Labelled diagram of equipment used and set up as used during the experiment - It is important that the temperature of the room and the surface area of the marble chips are kept as fair as possible. If the room temperature was higher at one point in the experiment it would warm the experiment up causing the two substances to react quicker. The warmer particles are the faster they move about, making it more often it hits and reacts with other particles. ...read more.

Conclusion

Observations Averages Time in Sec 2M 1M 0.5M 0.1M 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 360 Time in Sec 1 2 3 Average 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 360 Time in Sec 1 2 3 Average 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 360 Time in Sec 1 2 3 Average 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 360 Time in Sec 1 2 3 Average 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 360 ...read more.

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