To perform and observe the combination reaction - Lab Experiment, Class 10, Science Video Lecture

to perform and observe the following
reactions and classify them into one
combination reaction to the composition
reaction three displacement reaction for
double decomposition reaction one action
of water on line two action of heat on
ferrous sulphate crystals three iron
nails kept in copper sulphate solution
for reaction between sodium sulphate and
barium chloride solutions procedure for
combination reaction apparatus required
a rack of ten test tubes and a boiling
tube hot glass - two 200cc beakers six
droppers a test tube holder Bunsen
burner fire Tong chemicals required
small pieces of pig lime in crystal form
and not in powder form ferrous sulphate
crystals copper sulphate solute clean
unrested iron nails sodium sulfate
solution barium chloride solution
distilled water acidified potassium
dichromate paper litmus papers view as
well as red
cobalt chloride paper procedure
procedure for combination reaction take
afine and dry hundred CC beaker and in
it place about 5 grams of small pieces
of quick lime caution do not lift quick
line pieces with bare or wet hands it
can cause severe skin burns transfer the
quick line pieces with the help of tongs
or calipers fill a dropper with water
and pour about 5 cc of it in the beaker
meet your observations go on adding 5 cc
of water after every 1 minute for 5 more
times and go on recording your
observations
you
touch the base of the beaker with your
hand and record your observations
observations as soon as the water comes
in contact with the Quitline it starts
crumbling producing a sound of crackling
noise it gives off steamy vapor when
more of water is added after every one
minute the mixture form a thick white
suspension and starts boiling giving
steamy vapor after some time the white
mass settles at the base of the beaker
and over it collects a clear solution
the beaker on touching is found to be
very hot conclusions the reaction
between quicklime and water is
exothermic in nature that is the reason
that the steamy fuels are given out the
reaction can be represented by the
following equations
quicklime plus water form slake lime
plus delta T as two reactants in this
case two compounds entered into a
chemical reaction so as to form a single
product that is slag lime therefore the
reaction is chemical combination
reaction which is exothermic in nature
the pure liquid which collects above the
slicks line is calcium hydroxide
solution it is commonly called lime
water
you