The pH of milk, black coffee, 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.
Answers
The hydrogen ion mass in the given element can be determined by applying the given relation:
pH = -log []
(i) pH of milk = 6.8
Since, pH = -log []
6.8 = -log []
log [] = -6.8
[] = anitlog(-6.8)
=
(ii) pH of black coffee = 5.0
Since, pH = -log []( Note: A solvent with a concentration of hydrogen ions higher than 10-7mol/L is acidic, and a solution with a lower concentration is alkaline (another way to say necessary). Using the method, pH=-log[H+], a pH of 7 is neutral, a pH less than 7 is acidic, and a pH higher than 7 is essential. ... Pure water is neutral, with a pH of 7.0.)
5.0 = -log []
log [] = -5.0
[] = anitlog(-5.0)
=
(iii) pH of tomato juice = 4.2
Since, pH = -log []
4.2 = -log []
log [] = -4.2
[] = anitlog(-4.2)
=
(iv) pH of lemon juice = 2.2
Since, pH = -log []
2.2 = -log []
log [] = -2.2
[] = anitlog(-2.2)
=
(v) pH of egg white = 7.8
Since, pH = -log []
7.8 = -log []
log [] = -7.8
[] = anitlog(-7.8)