The pH scale is a logarithmic scale that measures the acidity or basicity of a solution. The pH is defined as the negative logarithm (base 10) of the hydrogen ion concentration ([H +]) in moles per liter:

pH = -log[H+]
Given that solution A has a pH of 6 and solution B has a pH of 8, we can make the following observations:

1. Hydrogen Ion Concentration:

» Solution A: [H+] = 10−pH of A =10−6 moles per liter
» Solution B: [H+]= 10 −pH of B =10−8 moles per liter
» Comparing these values, 10−6 is greater than 10−8, so solution A has a higher hydrogen ion concentration.

2. Acidity and Basicity:

» Lower pH values indicate higher acidity, and higher pH values indicate higher basicity.
» Solution A (pH 6) is more acidic than solution B (pH 8).

So, to summarize:

» Solution A has a higher hydrogen ion concentration and is more acidic.
» Solution B has a lower hydrogen ion concentration and is more basic.