av Elise Low 16 år siden
375
Elements
Elements
Mixtures
Rate of dissolving
surface area of solute
temperature of solution
rate of stirring
Rate of solubility
nature of solute
nature of solvents
temperature
Suspension
a mixture in which 2 or more parts can be seen
Solution
a mixture that appears to be made up of one substance
homogeneous appearance
dilute, concentrated, saturated
types: - solid-solid eg. alloys- solid-liquid eg. calamine lotion- liquid-liquid eg. vinegar- liquid-gas eg. soda drinks- gas-gas eg. air
not mixed in fixed proportion
can be seperated by physical methods
has properties of tis constitutional substances
no chemical reaction involved
Seperations of mixtures
paper chromatography
fractional distillation
distillation
evaporation
filtration
magnetic attraction
Compounds
broken down by :-passing heat-passing electricity
formed by combustion/decomposition
fixed in proportion by mass
different properties form its constitutional elements
Periodic table
Non-metals
dull, brittle
Metals
shiny, malleable, ductile
7 periods, 9 groups
