Asubstance that forms hydroxide ions in a water solution is a base true or false

According to Arrhenius definition of acid bases: An acid donates ions in aqueous solution and a base donates hydroxide ions in aqueous solution.

So the given statement that a substance that forms hydroxide ions in aquoeus solution is true.

Example of a base giving hydroxide ions in water:

in chemistry, a solution’s concentration is how much of a dissolvable substance, known as a solute, is mixed with another substance, called the solvent. the standard formula is c = m/v, where c is the concentration, m is the mass of the solute dissolved, and v is the total volume