The pH and pOH of a compound determine its acidity and basicity.
• pH
▪ pH stands for the negative logarithmic function of hydronium ion concentration
▪ can be calculated using the following equation:
Take note that: [H+] = [H3O+]
• pOH
▪ pOH stands for the negative logarithmic function of hydroxide concentration
▪ can be calculated using the following equation:
• The relationship between pH and pOH is connected by the following equation:
On the other hand, if the pH and pOH are given:
• The H+ or H3O+ concentration can be calculated using the following equation:
• The OH- concentration can be calculated using the following equation:
• The relationship between [H+] and [OH-] is connected by the following equation:
Kw = autoionization constant of water
Kw = 1.0x10-14 at T = 25°C
Complete this table of values for four aqueous solutions at 25 °C.
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