Sublimation
Sublimation is the change in state from a ___ to a ____ or from a _____ to a _____.
gas,solid,solid,gas or solid,gas,gas,solid
Why is fractional distillation not preferred?
It is a time consuming and complicated procedure
Simple distillation uses a ____ condenser. It is used to condense hot vapour.
Liebig
While boiling a substance with a high BP why do we have to choose the material of the apparatus carefully
So that no damage occurs to the apparatus if it reaches extreme levels of heat
Give another use of sublimation that was not mentioned in the presentation.
The answer depends, but a few can be
mothballs
water vapour turning into snow
any other example that is applicable!
What is the purpose of the beads in fractional distillation?
These beads are used as columns such that the liquids don't mix
Why is distilled water better than filtrated water for being used in chemical reactions?-
It gives out 99% clean water as compared to filtration.
Why can’t daily used glasses be used instead of the flask?
These flasks are graduated and calibrated, so are better for use in the lab.
How does a sublimation printer work?
It is a form of printing used mainly in the textiles industry, it is first in a gas stage,then solidifies into a solid when printed. Although expensive, it is extremely useful in the long run
Why are crude oils separated through fractional distillation?
Hydrocarbons have different melting points, so this method can be carried out to separate them
What are some of the disadvantages of simple distillation?
Mixtures with similar boiling points may cause impurities as the vapours would form at similar times. This would cause an impurity.
Unwanted chemical reactions.
List 5 precautions you should ensure while in the chemistry lab.
Any 5 valid points