Syringe Test Experiment

Syringe Test Experiment

Formula

Word: - Calcium Carbonate + Hydrochloric acid = Calcium Chloride +

Water + Carbon Dioxide

Symbol: - CaCOз + 2HC = CaCl + H 0 + CO

Equipment: - Flask, Glass gas syringe, Bung, Marble chips (Calcium

Carbonate (CaCOз)) and tubing.

Safety

Because of the dangerous chemical that will be handled goggles should

be wore during the experiment in case any should get in your eyes

while the chemical is being measured and the experiment is happening.

Fair test

§ The amount of hydrochloric acid is the same (20ml) for every

experiment using more or less of it in each one would highly affect it

making the results erroneous and useless.

§ The same amount of marble chips is used (2gs) for every experiment

if the amount was too varied the results would be unusable.

§ The test was repeated two times to ensure fair and accurate results

from averaging.

§ Washing each apparatus that I use so that there is no pass over of

acid or other substance.

Plan

§ Starting with a 0.25 molar.

§ Fill a flask with 5cm³ 1 molar hydrochloric acid and 15cm³ of

distilled water this will reduce the molar to 0.25.

§ The Tubing should be attached to the gas syringe and the other end

put in a bung which will be eventually be inserted in the lid of the

flask (fig 1).

§ At the last second before the bung in put on top the marble chips

(2gs) should be put in to the 2.5 hydrochloric acid so to catch the

full about of gas given off and the.

§ The temperature should be checked every 20 seconds over 200 seconds.

§ To ensure for accurate results the test should be repeated multiple

times the more times it's done the more accurate the results will be.

§ Finally you should gradually change the molar from 0.25 to 2 (0.25,

0.5, 0.75, 1, 2)

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