chemistry Flashcards
sodium test
dip metal wire into the solution and put it on a flame, if the flame turns golden yellow its got sodium
chloride test
mix sodium nitrate + nitric acid if theres chloride you’ll get a white precipate
why would a student heat the evaporating dish until the mass doesn’t change?
to make sure all the water vapour is gone and that there’s only salt left
how do you calculate the mass of sodium chloride remaining in a salt solution after evaporating water
mass of evaporating basin and dry contents - empty mass of evaporating basin
why is the condenser linked to the reactor in the haber process
to recycle all of the unreacted nitrogen and hydrogen gas
which metal is used as a catalyst in this reaction)
iron catalyst
what happens if the temperature increases
the yield decreases as its exothermic
what happens when pressure is increased?
equilibrium moves right, increasing yield and products
Oxygen gas
light splint
put out splint so still glowing
hold at open end of test tube
oxygen = relights
one use of ammonium nitrate
fertilisers
describe reaction between hydrogen and oxygen gas
combustion
reversible
2 words to describe hydrogen and oxygen reaction
combustion
reversible
Q 3.2
same rate
