I got the moles of each, now what? I don't really understand what the markscheme says..
Also, for 1g in making propene into a bromoalkane, why is uv radiation necessary? i thought you just neded the aqeous solution of chlorine (hcl) in a seperating funnel, decanting the upper layer off, shaking with sodium hydrogencarbonate, adding anyhdrous sodium sulfate and distilling for purity? none of this was in the mark scheme, but uv radiation and chlorine was...
Last edited by lollage123; 16-05-2012 at 18:49.
Mr KCl= 74.6 Mr NaCl = 58.5
KCl = (1/3)100g NaCl = (2/3)100g
this in moles is
KCl = 100/(3*74.6) NaCl = 200/(3*58.5)
in terms of K and Na is the same cause there is one mole of each in the corresponding compounds
so K:Na = 100/(3*74.6) : 200/(3*58.5)
ok im gonna edit this cause it might look confusing:
for every 1 gram of KCl there will be 2 grams of NaCl (because its two thirds is twice as much as one third)
so this in moles will be
(moles of kcl) 1/74.6 (moles of nacl) 2/58.5
1 mole nacl has 1 mole na, 1 mole kcl has 1 mole k
so the ratio for k:na doesnt change
Last edited by s.aley; 16-05-2012 at 19:38.
the reaction is propane -> chloropropane
this can happen as a photochemical reaction with chlorine
Last edited by s.aley; 16-05-2012 at 19:21.