2.2 Kw and the pH scale Flashcards
1
Q
pH equation
A
pH = -log10 [H+]
2
Q
how to find hydrogen ion conc. from pH
A
[H+] = 10-pH
3
Q
what is [H+] in pH = -log10 [H+]
A
the concentration of hydrogen ions in mol l^-1
4
Q
ionic product of water
A
Kw = [H+] [OH-] = 1 x 10^-14
5
Q
Kw = [H+] [OH-] = 1 x 10^-14
A
ionic product of water
6
Q
strong acids and alkalis ______ in aqueous solutions
A
completely dissociate
7
Q
calculate pH of 0.02M HCl
A
HCl completely dissociates in aqueous solution.. HCl —-> H+ + Cl-
one H+ is produced for each HCl dissociating so H+ = 0.02
pH = -log[H+]
pH = -log[0.02]
pH = 1.7
8
Q
NEED TO FINISH POWERPOINT 4
A
