Calcium itself is neutral.
Calcium phosphate is a neutral salt since it is formed from the reaction between a base (phosphate) and an acid (calcium). It does not have the characteristics of an acid or a base.
Calcium chloride solution is neutral.
Calcium sulfate is a salt because it is formed from the reaction between a base (calcium hydroxide) and an acid (sulfuric acid). It is a neutral compound with a 1:1 ratio of calcium ions (from the base) to sulfate ions (from the acid).
Calcium oxide (CaO) is a basic oxide, also known as a metal oxide. When calcium oxide is dissolved in water, it reacts to form calcium hydroxide, which is a strong base. The basic nature of calcium oxide is due to its ability to donate hydroxide ions (OH-) in solution, making it a base rather than an acid.
Calcium Bromide is a white, granular salt, very deliquescent, odorless, having a pungent, saline and bitter taste.
Calcium perchlorate is a salt, not an acid or a base. It is composed of calcium cations (Ca2+) and perchlorate anions (ClO4-).
Water is neutral, with a pH of 7. It is not an acid or a base.
Salt is neither an acid nor a base. It is a neutral compound formed from the reaction of an acid and a base.
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It is an acid
It is a base.
It is neither. It is a neutral substance when solvated in water.