pH, pOH, [H+] and [OH-] Quiz
Do not worry! You will do great! Whatever you do, don't stress eat! Your brain won't work as well!
Here are the formulas needed again:
pH=-log [H+]
pH+pOH=14
pOH=-log[OH-]
[H+]=2nd log [-pH]
[OH-]=2nd log [-pOH]
Find the missing values when given just one, and select the correct answer out of three possible ones. Also feel free to use the scientific calculator above for your calculations. Your answers may be slightly different due to rounding, but only by a few decimal places, so choose the answer with numbers closest to your findings.
1. Find the [H+], [OH-], and pOH, when given a pH of 7.92.
a. [H+]=1.20e-8, [OH-]=8.32e-7, pOH=6.08
b. [H+]=1.37e-9, [OH-]=18.32e-8, pOH=7.93
c. [H+]=3.20e-8, [OH-]=7.86e-7, pOH=5.88
2. Find the [H+], [OH-], and pH, when given a pOH of 8.51.
a. {H+}=7.92e-9, [OH-]=5.23e-12, pH=1.24
b. [H+]=3.24e-6, [OH-]=3.08e-9, pH=5.49
c. {H+}=4.24e-6, {OH-]=7.09e-11, pH=6.84
3. Find the [H+], [OH-], and pOH, when given a pH of 1.30.
a. [H+]=.050, [OH-]=1.99e-13, pOH=12.7
b. [H+]=7.09, [OH-]=3.27e-5, pOH=9.8
c. [H+]=4.92e-1, [OH-]=7.38, pOH=6.97
4. Find the [H+], pH, and pOH, when given an [OH-] of 2.04e-5.
a. [H+]=4.89e-10, pH=9.31, pOH=4.69
b. [H+]=6.67, pH=7.86, pOH=2.13
c. [H+]=7.43, pH=9.34, pOH=3.14
5. Find the [H+], [OH-], and pH, when given a pOH of 6.77.
a. [H+]=5.32, [OH-]=4.23, and pH=6.23
b. [H+]=8.32e-2 [OH-]=7.12, and pH=5.32
c. [H+]=5.88e-8, [OH-]=1.69e-7, pH=7.23
6. Find the [OH-], pH, and pOH, when given an [H+] of 2.04e-9.
a. [OH-]=4.89e-6, pH=8.69, pOH=5.31
b. [OH-]=5.32e-9, pH=7.54, pOH=8.43
c. [OH-]=3.24, pH=5.43e-12, pOH=4.21
7. Find the [H+], [OH-]. and pOH, when given a pH of 8.73.
a. [H+]=3.241e-9, [OH-]=1.35e-2, pOH=4.21
b. [H+]=1.85e-9, [OH-]=5.37e-6, pOH=5.27
c. [H+]=1.23e-8, [OH-]=5.32 pOH=3.24
8. Find the [H+], [OH-], and pH, when given a pOH of 9.38.
a. [H+]=8.28e-9, [OH-]=1.33 pH=6.24
b. [H+]=3.24e-7, [OH-]=3.21, pH=2.31
c. [H+]=2.39e-5, [OH-]=4.17e-10, pH=4.62
9. Find the [OH-], pH, and pOH, when given an [H+] of 3.15e-7.
a. [OH-]=3.16e-8, pH=6.5, pOH=7.5
b. [OH-]=4.32e-9, pH=4.21, pOH=2.3
c. [OH-]=5.31e-1, pH=3.12, pOH=7.55
10. Find the [H+], pH, and pOH, when given an [OH-] of 3.47e-9
a. [H+]=7.43e-7, pH=2.34, pOH=5.43
b. [H+]=2.89e-6, pH=5.54, pOH=8.46
c. [H+]=5.42e-4, pH=4.31, pOH=5.42
pH=-log [H+]
pH+pOH=14
pOH=-log[OH-]
[H+]=2nd log [-pH]
[OH-]=2nd log [-pOH]
Find the missing values when given just one, and select the correct answer out of three possible ones. Also feel free to use the scientific calculator above for your calculations. Your answers may be slightly different due to rounding, but only by a few decimal places, so choose the answer with numbers closest to your findings.
1. Find the [H+], [OH-], and pOH, when given a pH of 7.92.
a. [H+]=1.20e-8, [OH-]=8.32e-7, pOH=6.08
b. [H+]=1.37e-9, [OH-]=18.32e-8, pOH=7.93
c. [H+]=3.20e-8, [OH-]=7.86e-7, pOH=5.88
2. Find the [H+], [OH-], and pH, when given a pOH of 8.51.
a. {H+}=7.92e-9, [OH-]=5.23e-12, pH=1.24
b. [H+]=3.24e-6, [OH-]=3.08e-9, pH=5.49
c. {H+}=4.24e-6, {OH-]=7.09e-11, pH=6.84
3. Find the [H+], [OH-], and pOH, when given a pH of 1.30.
a. [H+]=.050, [OH-]=1.99e-13, pOH=12.7
b. [H+]=7.09, [OH-]=3.27e-5, pOH=9.8
c. [H+]=4.92e-1, [OH-]=7.38, pOH=6.97
4. Find the [H+], pH, and pOH, when given an [OH-] of 2.04e-5.
a. [H+]=4.89e-10, pH=9.31, pOH=4.69
b. [H+]=6.67, pH=7.86, pOH=2.13
c. [H+]=7.43, pH=9.34, pOH=3.14
5. Find the [H+], [OH-], and pH, when given a pOH of 6.77.
a. [H+]=5.32, [OH-]=4.23, and pH=6.23
b. [H+]=8.32e-2 [OH-]=7.12, and pH=5.32
c. [H+]=5.88e-8, [OH-]=1.69e-7, pH=7.23
6. Find the [OH-], pH, and pOH, when given an [H+] of 2.04e-9.
a. [OH-]=4.89e-6, pH=8.69, pOH=5.31
b. [OH-]=5.32e-9, pH=7.54, pOH=8.43
c. [OH-]=3.24, pH=5.43e-12, pOH=4.21
7. Find the [H+], [OH-]. and pOH, when given a pH of 8.73.
a. [H+]=3.241e-9, [OH-]=1.35e-2, pOH=4.21
b. [H+]=1.85e-9, [OH-]=5.37e-6, pOH=5.27
c. [H+]=1.23e-8, [OH-]=5.32 pOH=3.24
8. Find the [H+], [OH-], and pH, when given a pOH of 9.38.
a. [H+]=8.28e-9, [OH-]=1.33 pH=6.24
b. [H+]=3.24e-7, [OH-]=3.21, pH=2.31
c. [H+]=2.39e-5, [OH-]=4.17e-10, pH=4.62
9. Find the [OH-], pH, and pOH, when given an [H+] of 3.15e-7.
a. [OH-]=3.16e-8, pH=6.5, pOH=7.5
b. [OH-]=4.32e-9, pH=4.21, pOH=2.3
c. [OH-]=5.31e-1, pH=3.12, pOH=7.55
10. Find the [H+], pH, and pOH, when given an [OH-] of 3.47e-9
a. [H+]=7.43e-7, pH=2.34, pOH=5.43
b. [H+]=2.89e-6, pH=5.54, pOH=8.46
c. [H+]=5.42e-4, pH=4.31, pOH=5.42