Email: support@essaywriterpros.com
Call Us: US - +1 845 478 5244 | UK - +44 20 7193 7850 | AUS - +61 2 8005 4826

The percent composition of the product mixture

Add calcium chloride pellets one at a time to the organic solution until the liquid
is clear, not cloudy. Make a filter pipet by pushing a small plug of cotton into a Pasteur
pipet with a wooden stick. Push the cotton all the way down such that it is packed tightly
5
into the constriction of the pipet (see Figure page, Expt. 8). Holding the filter pipet over
a small clean, dry vial, transfer the liquid such that it passes through the cotton and into
the vial. To speed up the filtration, it is permissible to place a pipet bulb on the filter
pipet and gently squeeze the liquid through the cotton. Hold the vial in the hot water bath
for 5 minutes to evaporate the ether. After the ether has evaporated, your TA will inject
your product onto the gas chromatograph.
Read pp 291-307, Chapter 20, in LTOC to learn about the technique of gas
chromatography. The first couple peaks that appear are likely to be due to remaining
diethyl ether and unreacted 1-chlorobutane and should be allowed to run off the paper.
You may also see a peak for CH2Cl2, which is used to clean the syringe. The product
peaks will elute in the order of their boiling points, with the product of lowest boiling
point appearing first. Measure the distance from the origin to the tip of each product
peak on your GC trace so you can later calculate the retention times (see Fig. 20.10 on
p. 299). Record the chart speed. The molar amounts of each compound present in the
reaction mixture are proportional to the areas under the peaks in the chromatogram. To
determine relative peak areas, measure the height of the peak and the width at half-height,
and multiply the two numbers (see LTOC, Section 20.8, p. 305-3