Ncert Exercises & Solutions

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

Given,

[H^{+}] = 3.8 \times 10^{- 3} M

∴

pH value of soft drink

= - \log [H^{+}]

= - \log (3.8 \times 10^{- 3})

= - \log 3.8 \times 10^{- 3}

= - \log 3.8 + 3

= - 0.58 + 3

= 2.42