The pH of milk, black coffe, tomato juice, lemon juice and egg white are 6.8, 5.0, 4.2, 2.2 and 7.8 respectively. Calculate corresponding hydrogen ion concentration in each.

Explanation

Milk: `[H^(+)]=10^(-pH)(M)=10^(-6.8)(M)=1.58xx10^(-7)(M)`
Black coffee: `[H^(+)]=10^(-pH)(M)=10^(-5)(M)`
Tomato juice: `[H^(+)]=10^(-pH)(M)=10^(-4.2)(M)=6.3xx10^(-5)(M)`
Lemon juice: `[H^(+)]=10^(-pH)(M)=10^(-2.2)(M)=6.3xx10^(-3)(M)`
Egg white: `[H^(+)]=10^(-pH)(M)=10^(-7.8)(M)=1.58xx10^(-8)(M)`.