What happen if you adding water to the titrated substance in the conical flask during the process of titration?

Answer 1

No

User 1

Yes. By adding water to rinse, you will be changing the concentration of the thing you are titrating, and so your calculation will be off. If you have material on the walls of the flask, just gently stir the flask and let the solution in the flask wash anything off the walls.

User 2

I do not believe this is true. Once you add an amount of reactant into your flask adding more water will not change the number of moles of reactant that are present in the flask. The titrant will react in the mole ratio for that particular reaction so water doesn't play a role. You can rinse the flask and even use water to get part of a drop into your flask for a more accurate titration.

User 3

No. User 1 means to say that water in the volumetric burette or pipette will effect the concentration of titrant moles. Water in a conical flask will not effect the titre values because the same mole ratios are reacting, and your titre value is measured from the volume remaining in the volumetric burette and not the conical flask. User 2 is correct, although using water to rinse the volumetric burette's contents into the conical flask would adversely effect the results, as volumetric burettes and pipettes are designed to account for the few remaining drops in the instruments. Shaking or tapping the instruments is also a bad idea, as they can easily be broken and doing this would effect your titre values anyway.

User 4

It will not affect the result at all as long as you use distilled water, as just tap water obviously contains other minerals etc that will affect the results.

Answer 2

A dilution of the substance (change of concentration) and consequently an erroneous titration determination.

Answer 3

Washing with distilled water is used to remove any trace of contaminants.

Answer 4

Because distilled water is chemically neutral: neither acidic nor alkaline.