Question

MOH"lons. (This solution is at 25°C.) Calculate the pOH and pH values of a solution that contains 6.4 x 10 POH pH Remember to use the definitions of pH and pOH along with the equation that shows how hydronium lon concentration, hydroxide ion con related to each other for an aqueous solution Need Help? Master Submit Answer Practice Another Version

Answer 1

the formula for pH and pOH is given by:

pH = -log[H+]

pOH = -log[OH-]

where [H+] and [OH-] denote the concentration of H+ ions and OH- ions in the solution respectively

Also pH  and pOH are related as follows:

pH  + pOH = 14

Given

[OH-]=6.4*10-3 M

Therefore

pOH = -log[6.4*10-3 ]

pOH = 2.19

using the relation pH  + pOH = 14 , we calculate the pH

pH  = 14 - pOH

pH  = 14 - 2.19

pH  = 11.81

So your answer is

pOH = 2.19

pH  = 11.81