pOH scale is used to determine the basicity of a solution
pH scale is used to determine the acidity of a solution
pH and pOH are related in the following formula
pH + pOH = 14
once pOH is known we can calculate pH
pOH = 8.7
pH = 14 - 8.7
pH = 5.3
pH of the solution is 5.3
when pH is less than 7 the solution is said to be acidic
when pH is equal to 7 then solution is neutral
when pH is more than 7 then solution is basic
the pH of the solution here is 5.3 which is less than 7, therefore solution is acidic
acidic solution with pH of 5.3