Hi all,
Can help to answer the following Chemistry questions? Thanks in
advance.
Let me have a go :) 1(a) this one a bit funny how to get it- draw
the sugarcane smasher at the shop to collect the juice from the
sugar cane? (b) crystallization. heat the solution in an
evaporating dish until 1/3 of the original amount of solution is
present. place a glass rod into the evaporating dish, if crystals
start to form on the glass rod then stop heating it and let the
solution cool and crystallize. the sugar crystals will form on the
evaporating dish. filter the mixture. finally, open up the filter
paper containing the crystals and use another filter paper to dry
the sugar crystals. (c) melt the crystals. if a there is an
impurity present the melting point will occur in a range that is
lower than the melting point of the crystal (if impurity is
non-volatile). while if it is pure, it will melt at a definate
temperature. (d) it will boil in a range that is above 100 degrees
celcius. the crystals acts as an impurity. hence the boiling point
will increase and be at a range of 100 degrees celcius. 2) (i write
not so detailed now you should be able to do these questions...)
dissolve in water to get rid of NaCl, put H2SO4 to get rid or iron
and rust, then pour ethanol to get a solution of camphor. then do
crystallization to get camphor 3) did u skip school or something
-.-
