Question 207052
pH is the negative logarithm of the hydrogen ion concentration in a solution


the concentration is usually represented by [H+] ___ and measured in moles per liter
___ H is the chemical symbol for hydrogen; and the ion has a positive charge


the pH of water is 7 because the [H+] is 10^-7 moles/liter


so the [H+] of grapefruit is the number whose logarithm is -3.3
___ something between 10^-3 and 10^-4




taking the inverse log on a calculator ___ [H+] = 5.0 x 10^4 (approx)