Organic 2 Review Problem 505

Organic 2 Review Problem 505 - Q UANTITATIVE ANALYSIS 4 89...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
QUANTITATIVE ANALYSIS 489 easier to lift the reservoir J out of its rim for raising and lowering, rather than ftinning the ring up and down the central stand on each ocasion). Tap T 1 is 0ow cautiously opened to such an extent that not more than one bubble of gas per second passes, and these bubbles are observed carefully as they rise in the nitrometer tube. Bubbles containing a large proportion of air are not absorbed, guffer little diminution in size and rise rapidly up the tube. Bubbles of carbon dioxide, however, are absorbed, diminish in size and rise more and more slowly as they ascend. When all the air has been swept out of the combustion tube, the so-called micro-bubbles are obtained; these should almost disappear and not be larger than a fine dust; they swirl in the wide part of the nitrometer as they rise, instead of travelling straight upwards, and they rise extremely slowly. These bubbles are so small that it should be possible to collect them for upwards of half an hour before any detectable volume is registered on the nitrometer
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/19/2011 for the course CHM 2211 taught by Professor Castalleano during the Fall '06 term at University of Florida.

Ask a homework question - tutors are online