Question

Determine whether the stopcock should be completely open, partially open, or completely closed for each activity involved with titration.

Close to the calculated endpoint of a titration 

At the beginning of a titration

Filling the buret with titrant

Conditioning the buret with titrant 

Answer 1

I When it is close to caleulated endpoint of titration the stop cock have to bemain as Partially open. Because at the time close to endpoint we have to be careful that not excess titrant adds with the titration in tituated solution, Then we get the inconnect concentration of titerated solution. At the begining of a titisation stopwack have completely opened. At the starting of tituation end point is not beached. so to save our time we take stopcock completely opened to come closen to end point. When see that titration prooceduce come to close to end point then We take stopcock partially opened. 2 Filling the bubet with titrant stopcock have to semain completely closed. to bemain os At the time of conditioning the bonet with fitrant stopcock have to bemain completely closed.