for the observation question in planning (2 marks) can i say
effervescence and deep blue solid dissolves in excess h2so4 without
saying a blue solution is formed?
For the K more reactive than copper question, I talked about
much higher effective nuclear charge in Cu hence 4s1 electron more
tightly bound to nucleus blah blah... correct?
for the draw nucleophillic addition mechanism, in the second
step is it the lone pair on O just attack a H+ or is it lone pair
attack H in H2O to give the product and OH-?
and for the NO2 effect on environment can just say photochemical
smog and acid rain without talking about polluting river or
corroding limestone buildings?
Also, for slow corrosion of coper i said that a layer of CuO
forms that will slow down corrosion, is that correct?
other than that should be ok, but I skipped 10 marks of
planning, is it still possible to get A? :( Thanks
Yes.
Yes, but whether your answer scores all 4 marks depends on how
complete your points are.
The O- must abstract a H+ from H2O. H+ alone not accepted
because it's strongly alkaline pH.
Can.
Yes.
You calculate your overall % yourself lor. Right now A grade
boundary should be approx 75%. Let's see P3 and P1.