burette air bubbbles (1 Viewer)

[clever angel]

one of the things to be careful is to ensure that the tip of burrette is free of air buubbles

but why? how does it affect results


also just wanetd to know do we have to answer the q's in option section orderwise or can we do 7 marker in the end

 

[LostAuzzie]

Because if you have an air bubble at the tip the water level is higher and registers an incorrect volume.

With regards to your second question I'm not sure whether it is or not but from what ive seen (from exemplars and such on this site) Its better to have it orderwise.

 

[Dreamerish*~]

If you have air bubbles and you fill the burette with solution to the 0-mark, you will end up with less solution than you need.

I don't think it matters which order you do your questions. It might be more confusing for the markers if you don't do them in order, but as long as you answer all questions, you don't need to worry - they must mark every single word you hand in.