Vinegar is a liquid consisting of about 5–20% acetic acid(CH3COOH),
Sodium hydroxide is a strong base. In concentrated form its pH can go up to somewhere in the region of 13-14
The salts produced by the action of ammonia on acids are known as the ammonium salts and all contain the ammoniumion (NH4+). Although ammonia is well known as a weak base, it can also act as an extremely weak acid.
Water acts as a base (accepts H+) when it reacts with a stronger acid, say hydrochloric acid. If the medium is water, water, having a pH of 7, is considered neutral. If the medium is ethanol (or any other solvent), water can be acidic, neutral or basic
