Molecular Models Worksheet Page 6
ADVERTISEMENT
1
2
3
4
5
6
7
8
9M1.
(a)
bonding pair in the overlap and 6 other electrons arranged around the chlorine
must have either circles or symbols
need not be pairs but must not be in the overlap region
accept without H and Cl if clear
accept all x’s or all o’s
1
(b)
H
+
Cl
→
2HCl
2
2
accept multiples or fractions
accept correct formulae but not balanced for 1 mark
correctly balanced equation containing
‘correct’ lower / upper case symbols gets 1 mark
2
(c)
MgCl
2
‑
accept Mg
(Cl
)
2+
2
1
(d)
because magnesium chloride is made of ions or is ionic
accept there are strong forces of attraction between the ions
/ particles in MgCl
or strong electrostatic attractions
2
accept more energy to separate particles in MgCl
2
do not accept MgCl
molecules
2
do not accept reference to breaking bonds
1
hydrogen chloride is made of molecules or is covalent
accept there are only weak forces of attraction (between the
particles / molecules) in HCl
do not accept weak covalent bonds
Page 6
ADVERTISEMENT
0 votes
Related Articles
Related forms
Related Categories
Parent category: Education