complete the table

Question

Each row of the table below describes an aqueous solution at about 25 C

Complete the table. That is, fill in any missing entries in the second and third columns. Round your entries for 

[H₃O⁺] to 2 significant digits, and your entries for pH to 2 decimal places. 

solution	[H3O+]	pH
A	0.0012 mol/L	___
B	___ mol/L	8.20
C	5.5 x 10-7mol/L	___

Answer 1

A. pH = -log [H₃O⁺] = -log 0.0012 = 2.92

B. [H₃O⁺] = 1x10^-pH = 1x10^-8.20 = 6.31x10^-9 mol/L

C. pH = -log [H₃O⁺] = -log 5.5x10^-7 = 6.26