Clamp a boiling tube onto a clamp stand in front of a white tile/sheet of white paper
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Step 2:
Pour 10cm3 of 0.1M hydrochloric acid solution into the boiling tube
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Step 3:
Place an agar cylinder containing sodium hydroxide solution with phenolphthalein indicator into the boiling tube, making sure the agar cylinder is covered with hydrochloric acid and start the stopwatch/stop clock immediately
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Step 4:
Time how long it takes for the pink colour to disappear
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Step 5:
Repeat the experiment to get three results for 0.1M hydrochloric acid solution
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Step 6:
Repeat steps 1-5 for each concentration of hydrochloric acid, 0.5M, 1M, 1.5M and 2M, using a clean boiling tube each time
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Other cards in this set
Card 2
Front
Step 2:
Back
Pour 10cm3 of 0.1M hydrochloric acid solution into the boiling tube
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