Which solution below has the highest concentration of hydroxide ions
Asked by maham237 @ in Chemistry viewed by 300 People
a. pH= 3.21
b. pH= 7.00
c. pH= 7.93
d. pH= 12.59
e. pH= 9.82
Asked by maham237 @ in Chemistry viewed by 300 People
a. pH= 3.21
b. pH= 7.00
c. pH= 7.93
d. pH= 12.59
e. pH= 9.82
Answered by maham237 @
Answer:
Explanation:
You can solve this question using just some chemical facts:
Hence, since you are asked to state the solution with the highest concentration of hydroxide ions, you just pick the highest pH. This is the option d, pH = 12.59.
These mathematical relations are used to find the exact concentrations of hydroxide ions:
Then, you can follow these calculations:
Solution pH pOH [OH⁻]
a. 3.21 14 - 3.21 = 10.79 antilogarithm of 10.79 = 1.6 × 10⁻¹¹
b. 7.00 14 - 7.00 = 7.00 antilogarithm of 7.00 = 10⁻⁷
c. 7.93 14 - 7.93 = 6.07 antilogarithm of 6.07 = 8.5 × 10⁻⁷
d. 12.59 14 - 12.59 = 1.41 antilogarithm of 1.41 = 0.039
e. 9.82 14 - 9.82 = 4.18 antilogarithm of 4.18 = 6.6 × 10⁻⁵
From which you see that the highest concentration of hydroxide ions is for pH = 12.59.
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