Correct answer choice is :
D) By subtracting the pOH from 14
Explanation:
P is usually done with very small or very large values. To determine the pH of an aqueous liquid you want to know the density of the hydronium ion in moles per liter. The pH is then determined using the expression pH = - log [H3O+].POH is the contrary of the logarithm of the OH- ion concentration. pOH = - log [OH-] pH + pOH = 14, for an aqueous liquid at 25C, despite how many acid or base has been added to the suspension.
Since each ml of water weights 1 g, 0.1 liters of water = 100 grams. As well, "kilo" means "thousand". So 1 kilogram (kg) = 1000 grams. This means 100 g = 0.1 kg.
Acids are donors of protons (H+) and bases are acceptors of protons.
For example:
1) hydrochloric acid (HCl) in reaction with water give one proton to water and become chloride anion (Cl-).
2) ammonia (NH3) Is base, in reaction with water accepts one protone and become ammonium cation (NH4+).