Z zeee1999 Member Joined Aug 5, 2017 Messages 152 Location sydney Gender Female HSC 2017 Aug 9, 2017 #1 Sorry if this is a dumb question but how would this be solved: "Calculate the hydroxide ion concentration of a solution of potassium hydroxide with a pH of 9"
Sorry if this is a dumb question but how would this be solved: "Calculate the hydroxide ion concentration of a solution of potassium hydroxide with a pH of 9"
OkDen Active Member Joined Mar 1, 2016 Messages 146 Location 49°51′S 128°34′W Gender Male HSC 2018 Uni Grad 2025 Aug 9, 2017 #2 KOH --> K + OH pH+pOH = 14 pOH = 14 - pH = 14 - 9 = 5 [OH-] = 10^-pOH = 10^-5 = 0.00001M
R Robbie M Member Joined Jun 14, 2017 Messages 92 Location sydney Gender Male HSC 2017 Aug 10, 2017 #3 Yeah or an easier way is 10^-9 = [hydronium concentration] 1 x 10^-14 = [h3O+] x [OH-] 1 x 10^-14 / 10^-9 Thus 0.00001M = OH-
Yeah or an easier way is 10^-9 = [hydronium concentration] 1 x 10^-14 = [h3O+] x [OH-] 1 x 10^-14 / 10^-9 Thus 0.00001M = OH-
