Question

acid base solutions quick check
which change would decrease the ph of a base in a solution at equilibrium? (1 point)
increasing the initial concentration of solute
increasing the strength of the base
decreasing the concentration of oh⁻ ions
decreasing the amount of water added to the solute

Explanation:

The pH of a solution is related to the concentration of hydrogen - ions ($H^+$) and hydroxide - ions ($OH^-$). The formula for pH is $pH = 14+log[OH^-]$. Decreasing the concentration of $OH^-$ ions will decrease the value of $log[OH^-]$, thus decreasing the pH of the base solution. Increasing the initial concentration of solute or the strength of the base will increase the $OH^-$ concentration and raise the pH. Decreasing the amount of water added (dilution) will increase the $OH^-$ concentration and raise the pH.

Answer:

decreasing the concentration of $OH^-$ ions