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The Concentration of Hydrogen Ion in a Sample of Soft Drink is 3.8 × 10–3 M. What is Its Ph? - Chemistry

The concentration of hydrogen ion in a sample of soft drink is 3.8 × 10–3 M. what is its pH?

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Solution 1

Given

`[H^(+)] = 3.8 xx 10^(-3) M`

∴pH value of soft drink

`= -log[H^(+)]`

`= -log(3.8 xx 10^(-3))`

`= - log 3.8 - log 10^(-3)` 

= - log 3.8 + 3

= -0.58 + 3

= 2.42

Solution 2

pH = – log [H+] = – log (3.8 x 10-3) = – log 3.8 + 3 = 3 – 0.5798 = 2.4202 = 2.42

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APPEARS IN

NCERT Class 11 Chemistry Textbook
Chapter 7 Equilibrium
Q 41 | Page 228
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