. Flashcards
describe colour change when water is added
from blue to pink
suggest why the jar containing the unused cobalt chloride papers must be kept closed
to keep it a closed system so it prevemts anhydrous cobalt chloried frkm reacting with water in the air
give the name of a suitable piece of equipment for heating tube
bunsen burner
suggest the purpose of the icee and water in the beaker
drops of a clear colourless liquid formed on the inside of tube b name this liquid
to condense the water vapor proudced during reaction
water
define a reversible reaction
a reaction that can go forwards and backwards
explain what is meant by the term dynamic equilibrium
a reversible reaction in which the rate of the forward reaction equals the rate of the backward reaction and the concentrations of reactants and products remain the same
how would increasing the temp change the yield of ethanol at equilibrium
how would increasing pressure change the yield
increasing the temp would lower the yield of ethanol as the backwards eaction is exothermic
increasing pressure would increase yield of ethanol because the position of equilibrium moves in direction of fewer molecules
one use of amonia
fertiliser
the temp on the graph that gives the highest yield of ammonia is
200
why is a temp much lower than 450 not used for the habour process
ratw of reaction too slow
does 100.200.300 or 400 pressure give the highest yield of ammobia
400
why is a pressure lower than 200 atmosphere not used for the baner process
the rate of reaction would be too slow for the process to have economic benefits
whys a pressure higher than 200 atm not used for haber
the equilibrium position will shift towards reactiants which reduces yield of product
catalyst in haber process
iron
compound definution
substance made up of 2 ior more different elements chemically bonded
