If the solution is completely unknown, they would use qualitative chemical analysis.
If the solution was already known for certain to be just one of those two options, probably the easiest way would be to test if the solution conducts electricity: salt will conduct, sugar won't.
You could Boil it in a pan? Boil salt water and there should be a line of white on the side of the pan when the water has completely evaporated.
You could taste it? The salt water should taste revolting like when you are swimming in the sea and a wave washes over you. On the other hand, sugar water should taste sweet or you should just taste the water.
however it is unsafe to tasting the liquid when in a Laboratory even if your supervisor HAS stated that the beakers have been cleaned, there is no telling what was in there before you were using them. it could have been an Corrosive Acid (A harmful Substance that burns through things like wood, metal and skin) like Hydrofluoric Acid for example. It would be safer to use the boiling method as long as you don't get the hot water on you.
Hope that helped you lots. x :)
by testing the electrical conductivity of the solution
# You could test Density by floating something # You could test boiling point # You could test freezing point
Salt is sour and sugar is sweet.
Sugar is soft and salt is like rough and grainy.
Take two samples, and apply a catalyst which will react to salt and sugar respectively to each sample. Monitor and record the results.
A simple qualitative test is sufficient; adding some drops of silver nitrate to the sodium chloride solution become opalescent.
by testing the electrical
To determine what the white substance is we must add it to HCl.
Addition of aqueous bromine can test the solution for the presence of an alkene (cyclohexene).
The simplest way would be to use litmus paper, depending on the color it changes - that indicates whether you're dealing with an acid or a base. Pink/red is an acid, Blue is a base.
It has a bad smell that can be detected by our nose, even in small concentrations.Also, people could try taking a sample of air that contains hydrogen sulfide, and let it pass through a solution of lead nitrate, if the gas contained hydrogen sulfide then the solution will become black due to the lead sulfide that was produced.
It certainly helps, but not necessarily. You could always become a mad scientist.
no
You could try substituting the solution into the original question and check whether it is valid.
Biuret Test
That could be determined fairly easily by taste. Sucrose has a sweet flavor which ethanol does not.
remote sensing i think yea.
Honey is about 82% sugars and 17% water (by weight) in the form of a supersaturated solution.
To determine what the white substance is we must add it to HCl.
A beekeeper could be a scientist, but not necessarily.
By testing whether it is hyper or hypotonic solution. Also, the water potential!!
i'm no chemist .. but u could maybe add some kind of alkali and see if u can identify the resulting salts ? ..
Louis Pasteur
Well, they could but they shouldn't because they will do something wrong !!! And if it doesnt fit there hypothesis they need to try the experiment again until it fits there hypthesis !!! That would be my solution !!!