Question

1) How would your process for Part A have beeen different if you had used sulfuric acid in this experiment instead of hydrochloric acid? Be specific. (Hint: write out the balanced equation for the reaction between sulfuric acid and NaOH and discuss titration analysis.)

2) How would your results be affected if you forgot to "clear the jet" of the buret before proceeding with your titration? Be specific.

3) During the analysis, you periodically washed odwn the sides of the flask with DI water. Why doesn't it matter that you increased the colume of solution in your titration flask? Be specific.

Answer 1

Hii. You have not clearly mentioned about the what is part A. I think you are talking about NaOH and HCl titration.

1) If you use H2SO4 instead of HCl. Double volume of NaOH will require to neutralize H2SO4. Twi moles of NaOH are required to neutralize One mole of H2SO4.

H2SO4 + 2 NaOH =====> 2Na+ + SO4 2- + 2H2O

While with HCl, one mole of NaOH is required to neutralize one mole of HCl.

HCl. + NaOH =====> Na+ + Cl- + H2O

2) Jet correspond to nozzle of burette. There are chances of hanging of drop of solution. When you just open the stopper of burette that hanging drop goes to conical which will not counting in reading that way it will create error in reading.

3) Number of Moles are used in titration which doesn't effect with volume in conical flask. So we periodically wash the edges/ sides of conical flask with DI water.