Which species is the hydroxide ion?

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Multiple Choice

Which species is the hydroxide ion?

Explanation:
Think of hydroxide as water that has lost a proton. The remaining species is a single oxygen bonded to a hydrogen with one negative charge, written OH−. This distinguishes it from neutral water (H2O), which has no charge; oxide (O2−), which carries two negative charges; and hydroperoxide (HO2−), which has two oxygens and a different structure. So the hydroxide ion is OH−.

Think of hydroxide as water that has lost a proton. The remaining species is a single oxygen bonded to a hydrogen with one negative charge, written OH−. This distinguishes it from neutral water (H2O), which has no charge; oxide (O2−), which carries two negative charges; and hydroperoxide (HO2−), which has two oxygens and a different structure. So the hydroxide ion is OH−.

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