20.2 - The pH scale & strong acids

Question 1

Who was the founder of pH and how does the pH scale work?

Answer 1

Soren Sorenson - uses [H⁺] to measure pH

[H⁺] range from 10^-1 to 10^-14, pH is on a scale form 1 to 14

Question 2

How do you convert between [H⁺] and pH.

Answer 2

pH = -log[H⁺]

[H⁺] = 10^-pH

• a pH of 1 has 10 times as many H⁺ than a pH of 2
  
  • to dilute a solution from pH 1 to 4, dilution required is 1000 times.

Question 3

For mono-, di- basic acids, how does the acid conc. compare to [H⁺]?

Answer 3

For strong monobasic acids

[HA] = [H⁺]

For strong dibasic acids

2[HA] = [H⁺]