Preparation of ethene Flashcards
draw the diagram of the set up of equipment
glass wool soaked in ethanol
Al2O3
ethene
bunsen burner directly under al2o3
basin of water
why do we wear gloves when handling glass wool
glass wool is irritating to skin
why do we use glass wool to soak up ethanol
the glass wool prevents the ethanol from flowing into the aluminium oxide
what is the appearance of aluminium oxide
white powder
what is aluminium oxide used as
heterogeneous catalyst
how is ethene collected in the test tube
by downward displacement of water
why do we discard the first test tube of gas collected
it is most likely just air that was in the boiling tube and was displaced during the reaction
how many test tubes of gas were colleceted
5
why were 5 tubes of gas collected
for testing the properties of the gas
why do we not turn off the bunsen burner when finished
to prevent suck back and the boiling tube from shattering
`when do we turn off the bunsen burner?
after the apparatus has been lifted up and out of the water before
what colour is ethene
colourless
what smell does ethene have
sweet
is ethene soluble in water?
no
ethene is non polar
water is polar
ethene cannot form H bonds with water
how to test the combustion of ethene
hold a lighted wax taper at the mouth of a test tube containing ethene
once the gas stops burning add lime water to the test tube and shake to show the formation of CO2 by a colour change of colourless to milky white
