6.31 x 10⁻⁹ mole/dm³ hydronium ion present in milk.
The hydronium ion is H₃O⁺ and its concentration is equivalent to the H⁺ ion concentration. The H⁺ ion concentration is given by:
pH = -log [H⁺]
[H⁺] = 10^(-8.2)
[H⁺] = 6.31 x 10⁻⁹ mole/dm³
- (H3O+) The positive ion formed when a water molecule gains a hydrogen ion; all hydrogen ions in aqueous solution are present as hydronium ions
- (OH-) The negative ion formed when a water molecule loses a hydrogen ion
- An aqueous solution in which the concentrations of hydrogen and hydroxide ions are equal, that is 1.0 × 10-7 mol/L; it has a pH of 7.0 is called neutral solution.
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