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mafiozo [28]
3 years ago
15

What is the concentration of OH− and pOH in a 0.00072 M solution of Ba(OH)2 at 25 ∘C? Assume complete dissociation.

Chemistry
1 answer:
Mumz [18]3 years ago
3 0

Given :

0.00072 M solution of Ba(OH)_2 at 25^oC .

To Find :

The concentration of OH^-and pOH .

Solution :

1 mole of Ba(OH)_2 gives 2 moles of OH^- ions .

So , 0.00072 M mole of Ba(OH)_2 gives :

[OH^-]=2 \times 0.00072\ M

[OH^-]=0.00144\ M

[OH^-]=1.44\times 10^{-3}\ M

Now , pOH is given by :

pOH=-log[OH^-]\\\\pOH=-log[1.44\times 10^{-3}]\\\\pOH=2.84

Hence , this is the required solution .

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What is the ph of a solution of 0.400 m k2hpo4, potassium hydrogen phosphate?
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∴PH = -㏒[H+]

        = -㏒ (2.3 x 10^-4)
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3 years ago
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