The starting materials in a chemical reaction are called

The answer is: The starting materials in a chemical reaction are called reactants... or can be called reagents too.

The principal component in a chemical reaction are the reactants, after the reaction, we have the products and we could have reactants too (if they are not completed consumed).

For example, given the following reaction:

Reactants are: 2C2H6 and 7O2

Products are: 4CO2 and 6H2O

Have a nice day!

the dissociation of nickel hydroxide is follows:

the concentration of hydroxide ion is

the equilibrium constant value of nickel hydroxide is = 6.1 * 10^-^1^6 and thus equilibrium equation can be written as:

thus, concentration of ni is 0.23 * 10^-^4 mol /l