Uploaded August 2015 | Updated September 2026, 2 weeks ago

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These are the observations for the experimental procedures of the Preliminary Examinations 2015 for Juying Secondary.

Note:

1. There's a small mistake in the video - you should be describing the chalky limewater as "a white precipitate forms in limewater" rather than "the limewater turns cloudy".

2. Notice how strong heating lasts only for about 1-2 minutes at maximum.