Answer:
13.18
Explanation:
We'll begin by calculating the hydrogen ion concentration, [H⁺] in the solution. This can be obtained as follow:
HCl (aq) —> H⁺(aq) + Cl¯(aq)
From the balanced equation above,
1 mole of HCl dissociate to produce 1 mole of H⁺.
Therefore, 0.15 M HCl will also dissociate to produce 0.15 M H⁺.
Thus, the concentration of the hydrogen ion, [H⁺] in the solution is 0.15 M.
Next, we shall determine the pH of the solution. This can be obtained as follow:
Concentration of the hydrogen ion, [H⁺] = 0.15 M.
pH =?
pH = – Log[H⁺]
pH = – Log 0.15
pH = 0.82
Finally, we shall determine the pOH of the solution. This can be obtained as follow:
pH = 0.82
pOH =?
pH + pOH = 14
0.82 + pOH = 14
Collect like terms
pOH = 14 – 0.82
pOH = 13.18
Therefore, the pOH of the solution is 13.18
