introduction 3.1 Flashcards
what’s the chemical test for water?
anhydrous copper sulphate, turns from white to blue
tells us that water present but not how pure it is
what’s the two physical tests from water?
melting point 0 degrees
boiling point 100 degrees
the purer the water the more it matched the properties
what’s an element?
a substance containing only one type of atom
what’s some properties of metals and what side of the periodic table are they on?
left side
high melting and boiling point
conductors
malleable
shiny
what’s some properties of non-metals and what side of the periodic table are they on?
right
low boiling and melting point
insulators
brittle
dull
what’s the definition of a compound?
substance containing more than one type of atom, chemically bonded together
how can compounds be made?
by heating their elements together
for example if you heat and wait zinc and sulphur it creates zinc sulphide
what are the three types of compounds and what type of elements are they?
metallic - metals
ionic - metals and non-metal
covalent - non-metals
how is the compound ammonium chloride made?
in a tube
the two gases diffuse from the ends of the sealed tube
when they meet the compound ammonium chloride forms a white smoke
ammonia + hydrogen chloride > ammonium chloride
hydrogen chloride molecules are heavier as they diffuse slower
if you hear the tube the white smoke forms quicker
what’s solute?
the substance that is going to be dissolved
what’s solvent?
the liquid which is going to do the dissolving
what’s the solution?
the resulting mixture of the solute dissolved in solvent
what’s saturated?
a solution in which no more solvent can be dissolved
what’s solubility measured in?
g per 100g of solvent
what do you need to remember when measuring solubility?
g per 100 G OF SOLVENT
