pH ACIDS, BASES and SALTS Acids Bases - “Call Me Maybe” pH and pOH:

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Presentation transcript:

pH ACIDS, BASES and SALTS Acids Bases - “Call Me Maybe” pH and pOH: Crash Course Chemistry #30 pH Balance 0:00-01:39 Acids Bases - “Call Me Maybe”

ACIDS, BASES and SALTS H3O+(aq) + OH- (aq) Self ionization of Water H2O(l) + H2O(l)  H3O+(aq) + OH- (aq)

Ion Product constant [H3O+] * [OH-] = 1.0 x 10-14 M [H3O+] = [OH-] Kw = [H3O+] * [OH-] = 1.0 x 10-14 M [H3O+] = [OH-] [H3O+] = 1.0 x 10-2 M [OH-] = [H3O+] = [OH-] = 1.0 x 10-6 M

The pH scale - relates [H3O+] of substance because [H3O+] are such small numbers. pH and pOH: Crash Course Chemistry #30 01:45 - 6:36 - 10:30 (log of a number is the power that number must be raised to get that number/value) pH = - log [H3O+]

pH = - log [H3O+] pH < 7 [H3O+] 1 x 10-7 M pH = 7 [H3O+] 1 x 10-7 M

pH = - log [H3O+] pH < 7 [H3O+] greater than 1 x 10-7 M

pH = - log [H3O+] pH < 7 [H3O+] greater than 1 x 10-7 M pH = 7 [H3O+] equal to 1 x 10-7 M pH > 7 [H3O+]

pH = - log [H3O+] pH < 7 [H3O+] greater than 1 x 10-7 M pH = 7 [H3O+] equal to 1 x 10-7 M pH > 7 [H3O+] less than 1 x 10-7 M

pH = - log [H3O+] pH = - log (1.0 x 10-2 M) =

pH = - log [H3O+] pH = - log (1.0 x 10-2 M) = - [ (log (1) + log (10-2)] - [0 + -2]

pH = - log [H3O+] pH = - log (1.0 x 10-8 M) = - [ (log (1) + log (10-8)] - [0 + -8]

Do Practice Problems on overhead/board.