Question

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

Answer 1

pH = – log[3.8 × 10^–3 ] 

= – {log[3.8] + log[10^–3 ]} 

= – {(0.58) + (– 3.0)} 

= – {– 2.42} = 2.42 

Therefore, the pH of the soft drink is 2.42 and it is acidic.