Titration (1 Viewer)

[fancyyyyyy <3]

hey guys if i did a titration and yielded titration results of 28.5mL, 28.7mL, 27.9mL, 28.7mL, 28.7mL, 28.7mL should i take all of these values when calculating the average volume or ignore the 28.5mL and 27.9mL
also i didnt inlude the rough titration vol. btw
Any help is much appreciated thanks

 

[Qeru]

hey guys if i did a titration and yielded titration results of 28.5mL, 28.7mL, 27.9mL, 28.7mL, 28.7mL, 28.7mL should i take all of these values when calculating the average volume or ignore the 28.5mL and 27.9mL
also i didnt inlude the rough titration vol. btw
Any help is much appreciated thanks

Titres that are within 0.05mL of each other are considered concordant so I would only ignore 27.9mL.

 

[CM_Tutor]

Titres that are within 0.05mL of each other are considered concordant so I would only ignore 27.9mL.

I agree with Qeru that you need concordant results, which rules out the 27.9 mL. On the basis that concordant means a range (high to low) of no more than 0.10 mL, even the 28.5 mL result can be discarded.

 

[Qeru]

I agree with Qeru that you need concordant results, which rules out the 27.9 mL. On the basis that concordant means a range (high to low) of no more than 0.10 mL, even the 28.5 mL result can be discarded.

Do you mean 0.01mL?

 

[tito981]

Do you mean 0.01mL?

the range is 0.1ml so that would be +/- 0.05 from the concordant result.

 

[Qeru]

the range is 0.1ml so that would be +/- 0.05 from the concordant result.

Oh yeah idk what I was thinking lol

 

[CM_Tutor]

the range is 0.1ml so that would be +/- 0.05 from the concordant result.

Assuming the results are symmetric about the mean, yes. I would consider results of 27.42 mL, 27.40 mL, 27. 35 mL, 27.32 mL, and 27.41 mL concordant with an average of 37.36 mL, though I could also justify discarding the lowest for an average of 37.395 mL or even taking the three closest for results of 27.41 +/- 0.01 mL.

@Qeru, I did mean a range of 0.10 mL, though skilled titrators would expect to do better. I wouldn't be happy with a range of more than 0.05 mL in the results if I was doing the experiment... but I've had quite a bit of practice! (PS: I didn't see your subsequent comment before posting!)