what is the hydroxide ion concentration in a solution with the pH of 9.5 at 25°C
To find the hydroxide ion concentration in a solution with a pH of 9.5, we use the formula:
pOH = 14 - pH
First, calculate the pOH:
pOH = 14 - 9.5
pOH = 4.5
Now, convert pOH to hydroxide ion concentration (OH-):
[OH-] = 10^(-pOH)
[OH-] = 10^(-4.5)
[OH-] = 3.16 x 10^-5 M
Therefore, the hydroxide ion concentration in a solution with a pH of 9.5 at 25°C is 3.16 x 10^-5 M.