The pH of milk, black coffee, tomato juice, lemon juice and egg white are respectively. Calculate corresponding hydrogen ion concentration in each.

(I) 6.8, 

(II) 5.0, 

(III) 4.2, 

(IV) 2.2

(V) 7.8 

Asked by Pragya Singh | 11 months ago |  77

1 Answer

Solution :-

(I) The hydrogen ion concentration in the given substances can be calculated by using the given relation: 

pH = –log [H+](I) pH of milk = 6.8

Since, pH = –log [H+]

6.8 = –log [H+]

log[H+] = –6.8

[H+] = anitlog(–6.8)

\( 1.5\times 10^{-7} M\)

 

(II) pH ofblack coffee = 5.0

Since, pH = –log [H+]

5.0 = –log [H+]

log[H+] = –5.0

[H+] = anitlog(–5.0)

=\( 10^{-5} M\) 

 

(III) pH of tomato= 4.2

Since, pH = –log [H+]

4.2 = –log [H+]

log[H+] = –4.2

[H+] = anitlog(–4.2)

=\( 6.31\times 10^{-5} M\)

 

(IV) pH of lemon juice= 2.2

Since, pH = –log [H+]

2.2 = –log [H+]

log[H+] = –2.2

[H+] = anitlog(–2.2)

\( 6.31\times 10^{-3} M\)

 

(V) pH of egg white= 7.8

Since, pH = –log [H+]

7.8 = –log [H+]

log[H+] = –7.8

[H+] = anitlog(–7.8)

\( 1.58\times 10^{-8} M\)

Answered by Pragya Singh | 11 months ago

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