A 4- g mass of NaOH is dissolved in 5 mL of water.? a What is the approximate molar concentration of the NaOH? b. In Part A. 3, a 4- mL aliquot of this solution is diluted to 500 mL of solution. What is the approximate molar concen-tration of NaOH in the diluted solution? c. Part A. 4. Calculate the mass of KHC8H4O4 ( molar mass 204.44 g/ mol) that reacts with 15 mL of the NaOH solu-tion in Part A. 3. NaOHsolu-tioninPartA.3.