Be sure to answer all parts. an aqueous solution of a strong base has a ph of 10. 220 at 25°c. calculate the concentration of th

Question

2 years ago

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e base if the base is (a) lioh: × 10 m (b) ba(oh)2: × 10 m

1 answer:

tia_tia [17] · Answer 1 · 2023-08-26T20:37:20+03:00

An aqueous solution of a strong base has a pH of 10. 220 at 25°C then concentration of the base if the base is

(a) LiOH = 1.66× $10^{-4}$ M

(b) $Ba(OH)_{2$ = 3.32× $10^{-4}$ M

Calculation ,

For calculation of concentration of the LiOH and $Ba(OH)_{2$ first we have to calculate pOH of the solution.

pH + pOH = 14

pOH = 14 - pOH = 14 - 10.22 = 3.78

pOH = -㏒ [ $OH^{-}$ ]

[ $OH^{-}$ ] = $10^{-pH}$ = $10^{-3.78}$ = 1.66× $10^{-4}$

So , concentration of the base LiOH = 1.66× $10^{-4}$

So , concentration of the base $Ba(OH)_{2$ = 1.66× $10^{-4}$ ×2 = 3.32× $10^{-4}$

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