Add universal indicator to the beakers of water. Add a small amount of each salt to a different beaker and stir to dissolve. Compare the colors to the reference set. Note: the NaCl will not be pH 7, ...

Zinc oxide is a base, because it reacts with an acid to form a salt and water. It is not an alkali because it does not dissolve in water.

The article covers an experiment wherein a mixture containing an acid, base and a neutral compound need to be separated using acid or base extraction. The three compounds that need to be separated are ...