NaOH is a strong base. An aqueous solution is made containing 0.300mol.dm^-3 of NaOH at room temperature. Calculate the pH of this solution.

Concentration of NaOH=Concentration of OH- ions (NaOH is a strong base)

Kw=1x10^-14 (at room temperature/25 degrees)

using Kw=[H+][OH-]

We can figure out the [H+]

[H+]=Kw/[OH-]

[H+]=(1x10^-14) / (0.300)

Now we can put our concentration of H+ value into -log[H+] to find the pH using the fact pH=-log[H+]

pH=13.48

NK

Related Chemistry A Level answers

All answers ▸

What is Le Chatelier's principle?


Periodicity shows a fairly smooth increasing trend across a period for ionisation energy. However, between groups 2 & 3 and groups 5 & 6, the trend doesn't appear to be followed. Using your knowledge of chemistry, explain why the trend isn't followed here


How would you name complex organic compounds?


The alkanes and the alkenes are examples of homologous series of compounds. Name 3 properties of a homologous series.