Rewrite the following, choosing the correct word from each pair in brackets Acids are compounds which dissolve in water giving (hydrogen / hydroxide) ions. Sulphuric acid is one example. It is a (strong/weak) acid, which can be neutralized by (acids/alkalis) to form salts called (nitrates/sulphates).
Many (metals/ non-metals) react with acids to give a gas called (hydrogen/ carbon dioxide). Acids also react with (chlorides /carbonates) to give (chlorine / carbon dioxide).
Solutions of acids are (good/poor) conductors of electricity. They also affect indicators. For example, phenolphthalein turns (pink/colourless) in acids, while litmus turns (red /blue).
Alkalis are compounds that dissolve in water giving (hydrogen/ hydroxide) ions. They have a pH number (greater/less) than 7.

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