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Acids and Bases

Across
A number measuring the acidity of a substance
A substance with a pH greater than 7
A chemical reaction between an acid and a base, resulting in a salt water solution
A chemical that shows acidity by changing colour
Having a pH of 7
Down
Another word describing a basic solution: A________
An ion containing an oxygen atom and a hydrogen atom
A substance with a pH less than 7
A compound molecule made of a metal ion and a non-metal ion
An atom that has lost or gained electrons