A very good starting point for Chemistry revision is the curious chemistry video (below) by the Royal Institution which covers a range of topics including acids and alkaline.
https://youtube.com/watch?v=ti_E2ZKZpC4%3Ffeature%3Doembed
Another good chemistry video in this series of videos is The Magic of Chemistry, which is below. You can find the full range of these interesting and entertaining videos here.
https://youtube.com/watch?v=0g8lANs6zpQ%3Ffeature%3Doembed
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