Which of the following solution will hav...

Which of the following solution will have pH = 13 on assuming complete dissociation

100 ml of solution of 0.1 N` Mg (OH)_2`

0. 56 g of KOH in 100 ml solution

4 g of NaOH in 500 ml solution

100 ml of solution of 0.05 M Mg ` (OH)_2`

Text Solution

Verified by Experts

The correct Answer is:

A, B, D

(a) ` [OH^(-) ] =0.1 N , pOH = 1 rArrpH =13`
(b) ` n= ( 0. 56)/( 56) rArr M= ( 0.01)/( 0.1 ) =0.1`
`rArr POH =1 rArr pH = 13`
( c ) ` n= 4 //40 =0.1 rArr M =(0.1)/( 0.5) =0.2`
`rArr p = 14 - 1 log 2 =13.3`
(d) ` [OH^(-)] =2 xx 0.05 = 0.1 `
`pOH =1 rArr pH =13`
` NH_3 +H_2O hArr NH_4OH hArr NH_4^(+) +OH^(-) `
` C_1(1-alpha _1) C_1alpha _1 =C_2 `
`" " C_2( 1-alpha_2)C_2alpha _2 = C_3`

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Which of the following solution will have pH close to 1.0 ?

100 ml of (M/ to ) HCl +100 ml of (M/10) NaOH

55 ml of (M/to) HCl +45ml of (M/10) NaOH

10 ml of (M/10)HCl+90 ml of (M/10) NaOH

75 ml of (M/5) HCl +25ml of (M/5) NaOH

Which of the following solution will have pH closer to 1.0 ?

100 ml of M/10 HCl + 45 ml of M/10 NaOH

55 ml of M/10 HCl + 45 ml of M/10 NaOH

10 ml of M/10 HCl + 90 ml of M/10 NaOH

75 ml of M/5 HCl + 25 ml of M/5 NaOH

Which of the following solution will have no effect on pH dilution?

`0.3 M CH_3 COOK`

` 0.4 M CH_3 COONH_4`

` 0.2 MNH_4 OH+ 0.2 M NH_4 Cl`

` 0.3 H_2CO_3 +0.3 M NaHCO_3`