Question

The acidity model given by pH = -log10[H+] where acidity (pH) is a measure of the hydrogen ion concentration [H+] (measured in moles of hydrogen per liter) of a solution. Using this model, determine the pH of a solution with a hydrogen ion concentration of 2.3 X 10^-5 (round your answer to the nearest hundredth)

Answer 1

Hydrogen ion concentration, [H+] :

`{ \bf{[H {}^( + ) ] = 2.3 * {10}^( - 5) \: mol \: l {}^( - 1) }}`

Substitute to the negative logarithmic model:

`= { \tt{ - log(2.3 * {10}^( - 5) ) }} \\ pH = 4.64`