Which term describes this reaction?
addition
condensation
elimination
substitution

Answer;

-Condensation

Explanation;

-Condensation reaction  is a reaction that takes place when two molecules join together forming a larger molecule and also produces another smaller molecule in the process. The smaller molecule produced in the reaction is normally water, however, it can also be methanol, hydrogen chloride, among other small molecules.

-Condensation is common in many biological and chemical processes such as formation of disaccharides, and polmerization reactions, where small molecules join to form a larger molecule called a polmer.

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