Acids and alkalis from ex-test
A 19m 6s video on Acids & Alkalis from Scientific Eye:
Science in Action – Acids & Alkalis – an 18m 45s video.
KS3 Bitesize foundation level – Metals, Acids & Alkalis – a video that covers Metals and then Acids & Alkalis (the bit we need).
Infographic from Compound Interest: