If the pH of an aqueous solution is 5, what is
the OH− concentration?
Thanks my dude
To determine the OH− concentration in an aqueous solution, we need to use the relationship between pH and pOH.
pOH is the negative logarithm of the concentration of hydroxide ions (OH−) in the solution. The formula for pOH is:
pOH = -log[OH−]
pH is the negative logarithm of the concentration of hydrogen ions (H+) in the solution. The formula for pH is:
pH = -log[H+]
In neutral water, the concentration of OH− and H+ are equal, so the pH and pOH are both 7.
However, in this case, the pH is given as 5, which means the H+ concentration is 10^-5 M.
To find the pOH, we subtract the pH from 14 (since pH + pOH = 14):
pOH = 14 - pH
= 14 - 5
= 9
Now that we have the pOH, we can use the formula to find the OH− concentration:
OH− = 10^(-pOH)
Plugging in the pOH value we found:
OH− = 10^(-9)
≈ 1 x 10^(-9) M
Therefore, the OH- concentration in the solution is approximately 1 x 10^(-9) M.
pH+pOH=14
pOH=13.5
OH conc=10^-13.5 moles/liter
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The FitnessGram Pacer Test is a multistage aerobic capacity test that progressively gets more difficult as it continues. The 20 meter pacer test will begin in 30 seconds. Line up at the start. The running speed starts slowly, but gets faster each minute after you hear this signal. [beep] A single lap should be completed each time you hear this sound. [ding] Remember to run in a straight line and run as long possible. The second time you fail to complete a lap before the sound. Your test will begin on the word start. On your mark, get ready, start