Continuing into the world of acids and bases…
Apr 01, 2015
Continuing into the world of acids and bases…
pH of a solution is the negative logarithm of the hydrogen ion concentration pH = -log [H+]
This number represents how strong or weak an acid/base is
The pH scale ranges from 1-14 pH less than 7 is an acid the lower pH = the stronger the acid
pH greater than 7 is a base the higher the pH = the stronger the base
Find the pH if the hydrogen concentration are as follows:
a) 1.0 x 10-2 M
b) 3.0 x 10-6 M
c) 0.0055 M
pOH = - log [OH-]
Everything is the opposite pOH less than 7 = base The lower the pOH, stronger the base pOH greater than 7 = acid The higher the pOH, stronger the acid
Find the pOH for the following hydroxide concentrations:
a) 1.0 x 10-6 M
b) 0.000033 M
pH + pOH = 14
Find the pH if a solution has the following hydroxide concentration:
[OH-] = 8.2 x 10-6 M
What if you are given the pH and want to find the concentration of hydrogen ions?
[H+] = 10-pH
1) What is the [H+] if the pH is 8.9?
2) What about if the pH is 2.3?
Kw = 1.0x 10-14 M
1.0 x 10-14 = [H+] [OH-]