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Chemical Properties of Ethers

The pH value ...

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The pH value of decinormal solution of NH_4OH which is 20% ionised i

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Q. The pH value of decinormal solution of

{N H}_{4} O H

20

Q. Ammonium hydroxide

N H_{4} O H

(a weak base) solution has a concentration of 0.02 M. Then the

p H

value of this solution is :
The ionization constant

(K_{b})

N H_{4} O H

1.8 \times 10^{- 5} M

Q. Calculate the osmotic pressure of a decinormal solution of

N a C l

which is ionised to

80 %

27^{o} C

?

Q. Calculate the

p H

of a solution obtained by diluting

25

ml of decinormal

H C l

500

ml assuming complete ionisation of

H C l

Q. Assertion :On addition of

{N H}_{4} C l

{N H}_{4} O H

p H

decreases but remains greater than

7

. Reason: Addition of

{N H}_{4}^{+}

ion decreases ionisation of

{N H}_{4} O H

[{O H}^{-}]

is decreased hence,

p H

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