Solved: Using pH to Determine the Concentration of a SaltA
Chapter , Problem 1PE(choose chapter or problem)
Problem 1PE
Using pH to Determine the Concentration of a Salt
A solution made by adding solid sodium hypochlorite (NaCIO) to enough water to make 2.00 L of solution has a pH of 10.50. Using the information in Equation calculate the number of moles of NaCIO added to the water.
ClO-(aq) + H2O(l) ⇌ HClO(aq) + OH-(aq) Kb= 3.3 x 10-7
The benzoate ion, C6H5COO-, is a weak base with Kb - 1.6 x 10-10. How many moles of sodium benzoate are present in 0.50 L of a solution of NaC6H5COO if the pH is 9.0*4?
(a) 0.38, (b) 0.66, (c) 0.76, (d) 1.5, (e) 2.9
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