Question

11. What is the effect on the standardization of a basic solution with KHP Of.. A losing a small amount of KHP when transferring it to the collection Erlenmeyer flask after weighing? B. adding a small amount of water to the solid KHP to fully dissolve it before adding the base? C. rinsing the tip of the buret with a wash bottle while dispensing base before the end point and allowing that rinse to enter the collection flask? D. mistakenly adding a few extra drops of base into the Erlenmeyer flask when approaching the end point and having the phenolphthalein turn bright pink?

Answer 1

Normality of Naolt weight of kHP x 1000 Berrete reading x 204.2 A losing a small amount of KHP when transferring it to the collectich Erlenmeyer flask after weighing ? - Due to loss of kHP weight the calculated normality of Naolt or base will be too high than the actual normality 13. Ang Adding small amount of water to the solid KHP will not impact on the ccalculated normality and actual ngrondity of base. as number of moles of kitp. remain same. Ans - It will impart error in the experi- ment. the ecelculated normality will be too low than the actual normality of the base d. Ans - the calculated normality of house will be too low than the certaal concentration of base.