If the base buret were not rinsed with NaOH prior to filling, how would the molarity of the base be affected?

Question

If the base buret were not rinsed with NaOH prior to filling, would the calculated molarity of the base be TOO HIGH, TOO LOW, OR UNAFFECTED? WHY?

Answer 1

It depends what substance contianed the buret before filling it with NaOH.

If there was more concentrated base your calculated molarity will be higher because you are adding more alkali to the solution to be titrated. The opposite is true.

If there was water or acid your calculated molarity would be lower.

It is important to rinse the buret in order to get an uniform concentration through the lenght of the glass tube that forms the buret.

Good luck!

Answer 2

It really depends on what was in it before and how clean it was washed. The calculated molarity would probably be unaffected, or may be slightly low if contamiantion of the buret was suspected.

NaOH is a strong base so it is not likely to be greatly affected by contaminants other than strong acids.

Answer 3

That replaced right into a sprint confusing, yet i think of you're asking, once you're doing a titration with NaOH answer and you rinse the buret with DI H2O, how that could influence your effect. the respond is, once you rinse the buret, the countless liquid you rinsed it with remains in there. in case you rinse it with DI H2O, the water left in the buret includes no NaOH and hence the molarity of your NaOH answer is gently decrease than recorded. you will possibly degree the acid to be somewhat more desirable than it definitely is. by making use of rinsing the buret with the answer you prefer to titrate with, you verify that any liquid ultimate in the buret won't influence the final molarity.

Answer 4

Great. A q straight out of the lab text.

The answer is TOO LOW, because a neutral or acidic substance could have contaminated the buret.