Notes on PPQs Flashcards
1
Q
what effect do impurities have on the mp & bp of a substance?
A
decrease mp as they disrupt the crystal/lattice structure?
increase bp
2
Q
why is the solution containing [Al(H2O)6]3+ acidic?
A
Al3+ is highly charged & small size
Al3+ attracts the e-s from the O-H bond
O-H bond is polarised
O-H weakens
H+ released
3
Q
LOOK AT WHERE GRAPH AXES START
A
MIGHT NOT BE 0
4
Q
HCl reacts with NaOH in another reaction
A
reacting ratio is 1:1 NOT using the molar ratio in the previous step
5
Q
what are the bond angles in cyclohexane?
A
all 109.5
6
Q
what is the order of polarity of C=O, O-H & -O- bonds?
A
most polar –> least polar
O-H
C=O
-O-
