hydroxide ion concentration when pOH=0.5
To find the hydroxide ion concentration when pOH=0.5, we can first calculate the pH using the formula:
pH + pOH = 14
Therefore, pH = 14 - pOH
= 14 - 0.5
= 13.5
Now that we have the pH, we can calculate the hydrogen ion concentration using the formula:
[H+] = 10^(-pH)
= 10^(-13.5)
≈ 3.16 x 10^(-14) mol/L
Finally, we can find the hydroxide ion concentration using the formula:
[OH-] = Kw / [H+]
= 1.0 x 10^(-14) / 3.16 x 10^(-14)
≈ 3.16 x 10^(-1) mol/L
≈ 0.316 mol/L
Therefore, the hydroxide ion concentration when pOH = 0.5 is approximately 0.316 mol/L.