OH⁻¹
Hydroxide
OH⁻¹ represents the hydroxide ion, which is a negatively charged polyatomic ion composed of one oxygen atom and one hydrogen atom. It is commonly found in aqueous solutions and is often referred to as a base due to its ability to accept protons (H⁺) from acids to form water (H₂O). When the hydroxide ion is added to an acidic solution, it can help to increase its pH and neutralize its acidity. The concentration of hydroxide ions in a solution is typically expressed using the pOH scale, which is the negative logarithm of the hydroxide ion concentration. The pH and pOH scales are related, with the sum of their values always equal to 14 in aqueous solutions at 25°C.
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