review 1 Flashcards
what are most elements at room temperature states
solid
what are alkanes and alknese state
gas
explain why copper turns black
oxygen reacts with copper to form copper oxide
what determines how far something will diffuse speed
RFM
what are the conditions for a dynamic equilibrium
the rate of forward reaction = the backwards one
the conc of products and reacts stay at a constant
that forward and backward reaction occur at the same time
what happens by adding heat (equilibrium)
the backward reaction would be favoured and therefore the backward reaction is endothermic
do impruties remain in filter paper and give a reason
impurities remain in filter paper because they are insoluble
what happens when you add sulfur dioxide to oxygen
it burns with a blue flame
why is silica there on downward delivery
to dry the gas
what is formed when sulphur dioxide is added to acid
sulfric acid
does dry litmus paper bleach
no
Describe how the scientist could make sure that all the water has been lost?
Heat to constant mass
methyl orange indicator acid
red
what is methyl oraaneg indicator when yellow
neutral and alkaline
phenolphthalein colours
is colourless in acid and neutral but pink for alkaline
