The question is incomplete, the complete question is;
An aqueous solution at 25°c has a poh of 7.87 . calculate the ph. be sure your answer has the correct number of significant digits.
Answer:
6.13
Step-by-step explanation:
We know that pH +pOH =14
From the question, we have POH =7.87
Hence, pH=14 - POH
pH = 14 - 7.87
pH = 6.13