For each strong base solution, determine [H3O+], [OH], pH, and pOH. 5.0×10 4 M C
ID: 536916 • Letter: F
Question
For each strong base solution, determine [H3O+], [OH], pH, and pOH.
5.0×104
M Ca(OH)2
Express your answer to two decimal places. Enter your answers numerically separated by a comma.
5.0×104
M Ca(OH)2
Express your answer using two significant figures. Enter your answers numerically separated by a comma.
2.0×104
M KOH
Express your answer to two decimal places. Enter your answers numerically separated by a comma.
2.0×104
M KOH
Express your answer using two significant figures. Enter your answers numerically separated by a comma.
1.10×102
M Ba(OH)2
Express your answer to three decimal places. Enter your answers numerically separated by a comma.
1.10×102
M Ba(OH)2
Express your answer using three significant figures. Enter your answers numerically separated by a comma.
8.63×103
M LiOH
Express your answer to three decimal places. Enter your answers numerically separated by a comma.
8.63×103
M LiOH
Express your answer using three significant figures. Enter your answers numerically separated by a comma.
pH,pOH =Explanation / Answer
Question 1.
for
5.0×104 M Ca(OH)2
calculate
a) [OH-]
1 mol of Ca(OH)2 = 2 mol of OH-
so
5*10^-4 M of Ca(OH)2 = 2*(5*10^-4) = 0.001M of OH-
[OH-] = 0.001 M
b) pOH
for
pOH = -log([OH-])
pOH = -log(0.001) = 3
c) pH
from the equilbirium of water
we know
pH + pOH = 14
pH = 14-pOH = 14- 3 = 11
d)
finally
[H+] can be obtained via pH
[H+] = 10^-pH
[H+] = 10^-11 M
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