PDF chapter test TRY NOW

Example 1:
  
Calculate the pH of a solution in which the concentration of the hydrogen ions is 1.0×10^{–8} mol litre^{–1}.
 
Solution:

Here, although the solution is extremely dilute, the concentration given is not of an acid or a base but that of H^+ ions. Hence, the pH can be calculated from the relation:


Given:

[H^+]=1.0×10^{–8} mol litre^{–1}

pH = –log_{10}10^{–8}
 
= –(–8×log_{10}10)

 
Example 2:
 
If the pH of a solution is 4.5, what is its pOH?

Solution: