Whole Course & Chemical Analysis Flashcards
hydrogen
a gas which burns with a squeaky pop
oxygen
a gas which relights a glowing splint
carbon dioxide
a bas which, when bubbled through lime water, turns it cloudy/chalky/milky.
ammonia
a gas which turns moist pH paper blue
evaporation
a technique used to separate soluble salt from solutions
flame test
a technique used to identify the presence of metal ions by colour
water bath
a a safe heating methods used when the reactants/products in a reaction are flammable
filtration
a technique used to separate a solid from a solution
precipitation reaction
hen two solutions are mixed and an insoluble solid is formed
distillation
separates mixtures of liquids with different boiling points
concordant results
results within 0.2cm3 of each other (i.e. close enough to be used in calculating an average)
standard solution
a solution of accurately known concentration
mole
the relative atomic/formula mass of an substance expressed in grams
molten
describes a liquid formed by melting a solid
pipette
apparatus used to measure a specific volume of liquid or solution
titration
technique used to accurately measure the volume of liquid or solution required for a particular reaction
variable
a factor that can be changed in a chemical reaction
burette
graduated piece of apparatus used to measure accurately the volume of liquid or solution dispensed during an experiment
reliability
the consistancy of results within a test. is increased by repeating results.
accuracy
the degree to which a measurement is true / correct
