If the concentration of H+ in an aqueous solution is 0.005 M at equilibrium at 298 K, what is the pOH

pOH = 11.7

Explanation:

From the question given above, the following data were obtained:

Concentration of Hydrogen ion [H⁺] = 0.005 M

pOH =.?

Next, we shall determine the pH of the solution. This is illustrated below:

Concentration of Hydrogen ion [H⁺] = 0.005 M

pH =?

pH = – Log [H⁺]

pH = – Log 0.005

pH = 2.3

Finally, we shall determine the pOH of the solution as follow:

pH = 2.3

pOH =.?

pH + pOH = 14

2.3 + pOH = 14

Collect like terms

pOH = 14 – 2.3

pOH = 11.7

Therefore, the pOH of the solution is 11.7

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