Calculate the pH and pOH of the following solution and identify each solution as acidic, basic or neutral. (with solutions)
1. [H3O+] = 1.0 x 10-9 M
2. [OH-] = 1.0 x 10-8 M
3. [H3O+] = 0.0010 M
4. [OH-] = 0.010 M
In the question molarity of different solution is given
and we know that
"pH= -log[H_3O^+]"
"pOH= -log[OH^{-1}]"
1 . "pH= -log[1.0\\times 10^{-9}]"
pH= 9
Since, its pH value is 9 so it is mild basic
2 . "pOH= -log[1.0\\times 10^{-8}]=8"
pH = 14-8= 6
so it is weak acid
3 . "pH= -log[1.0\\times 10^{-3}]=3"
It is acidic
4 . "pOH= -log[1.0\\times 10^{-2}]= 2"
pH = 12 it is basic
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