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acid + alkali = salt + water.

Acids are proton donors, they donate a H+ (aq) ion (a hydrogen ion). Acids have pH values of less than 7.

Alkalis are proton acceptors, they donate a -OH (aq) ion (a hydroxide ion). Alkalis have a pH value of above 7.

They react together to make a neutralisation reaction.

The pH scale is a numerical scale from approximately 0 to 14 which measures how strong an acid or an alkali is.

If you use hydrochloric acid you will form a chloride salt.

If you use sulphuric acid you will form a sulphate salt.

If you use nitric acid you will form a nitrate salt.

For example:

hydrochloric acid + sodium hydroxide = sodium chloride + water

If you react an acid and an alkali you always get a salt + water.

An alkali is NOT THE OPPOSITE OF AN ACID!!! The opposite of an acid is called a BASE. An alkali is a base that is soluble in water (e.g. sodium hydroxide, lithium hydroxide, ammonia)
Neutralization.

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