3.3 Effects of Changes in pH Flashcards
1
Q
when acids dissolve in water, they add ____
A
H+
2
Q
when bases dissolve in water, they ______H+
A
decrease
by absorbing it or releasing OH-
3
Q
how to tell is acid/base is strong
A
they disassociate completely in water (nonreversible)
4
Q
in any aqueous solution at 25ºC, the product of the h+ and OH- concentrations is constant at ____
A
10^-14
5
Q
pH=
A
-log[H+]
6
Q
in neutral solution [H+]=10^-7
A
-log10^-7 =
10^? =10^-7
?=7
ph of neutral solution = 7
7
Q
substances that minimize changes in the concentrations of H+ and OH- in a solution:
A
buffers
8
Q
how do buffers work
A
the accept H+ excess and donate H+where depleted
9
Q
most buffer solutions consist of
A
weak acid + corresponding base
