4. Why should the base of known concentration be taken in a dry beaker or in a beaker rinsed with the base? It is rinsed with to avoid diluting it. the base in orde 5. Why doesn't the conical flask have to be dry or rinsed with the acid to be analyzed? because to react it will effect the numbers of molecules in the glass in glass in the analy 6. Error propagation: In determining the concentration of HCl, a student did not realize that the base in the burette contained an air bubble. Would this result in any error in the determination of your acid concentration? a) Yes. b) No. If yes, pick the answer showing how the air bubble would affect the determination of the concentration of the acid. a) The calculated normality of the acid will be higher than the actual normality. b) The calculated normality of the acid will be less than the actual normality. c) There will be no net effect on the calculated normality of the acid. Explain your answer. 19