Chemical Analysis Flashcards
In chemistry, what is a pure substance
something made up of only one type of substance
what is the difference between the melting and boiling points of a pure and impure substance
pure = sharp/one specific temperature
impure = broad/occurs across a range of temperatures
what is a formulation
a mixture designed for a specific purpose
what are some examples of formulations
-fuels
-cleaning agents
-paints
-medicines
-alloys
-fertilisers
-foods
what is chromatography
a process for separating coloured mixtures
how is Rf calculated
Rf= distanced moved by substance (divided by) distance moved by a solvent
what is the test for hydrogen
a lit splint gives a squeaky pop
what is the test for oxygen
a glowing splint re-lights
what is the test for carbon dioxide
turns limewater milky if bubbled through it
what is the test for chlorine
bleaches damp litmus paper white
