Question

A substance that produces hydroxide ions when placed in water is a(n) _____.

acid
solution
base
solvent

Answer 1

A substance that produces hydroxide ions when placed in water is a base. When a base is dissolved in water, the molecule will form into ions and bases produce OH- ions. Meanwhile, acids produce H+ in water.

Answer 2

Answer: A substance that produces hydroxide ions when placed in water is base.

Step-by-step explanation:

Bases are the substance:

• Which gives negatively charged hydroxide(
  `OH^-`) ions in aqueous solution.

• Which have pH value ranging from 7 to 14.

• 
  `BOH(aq)\rightarrow B^+(aq)+OH^-(aq)`

Where as acid gives positively charged hydronium ion(
`H^+`) in aqueous solution.