Name……………………………………..
A Level Chemistry Holiday Homework
Please complete this over the holidays and bring it with you to your first
chemistry lesson.
Balancing Equations
1. ____ MgF2 + ____ Li2CO3  ____ MgCO3 + ____ LiF
2. ____ Mg(OH)2 + ____ HCl  ____ H2O + ____ MgCl2
3. ___ NaBr + ____ Cl2  ____ NaCl + ____ Br2
Atoms
1. Draw the structure of an atom of magnesium.
24
12Mg
2. Why don’t atoms have an overall charge but ions do?
3. Why can gases made up of single atoms be compressed?
Bonding (Multiple Choice, circle the correct answer)
1. Which one of the following pairs of atoms is most likely to form an ionic bond?
A)
Na and F
B)
C and F
C)
N and F
D)
O and F
2. Aluminium is in Group III. Its oxide will have the formula...
A)
AlO
B)
AlO2
C)
Al2O3
D)
Al3O2
1
A Level Chemistry Holiday Homework
3. Which one of the following is not a form of chemical bonding?
A)
covalent bonding
B)
hydrogen bonding
C)
ionic bonding
D)
metallic bonding
Ions
1. Elements form ions by losing or gaining electrons in order to have a full outer
shell.
Metals lose electrons to form positive ions and non-metals gain electrons to form
negative ions.
What is the formula of the ion produced by
a) sodium
b) oxygen
c) barium
d) fluorine
2. Name the following ions
a) OH b) NH4 +
c) CO3 2d) NO3 -
3. Complete the table below
Formula
Positive ion
Negative ion
LiCl
Lithium chloride
CaO
MgSO4
Na+
2
Name
OH-
A Level Chemistry Holiday Homework
Formulae.
1.The correct formula of sodium chloride is:
a.
b.
c.
d.
SCl
NaCl2
NaCl
NaC
2. The correct formula of calcium carbonate is:
a.
b.
c.
d.
CaCO
CaCO3
CaCO2
Ca2CO3
Equipment
1.
Match up each piece of equipment with its name. A few of the harder ones are
already done for you.
Equipment name
Volumetric flask
Condenser
Gas syringe
Buchner funnel
Filter funnel
Burette
Still head adapter
Round bottom flask
Beaker
Buchner flask
Conical flask
Measuring cylinder
Thermometer
3
Picture number
2.  and
were both used to
measure out 25cm3 of hydrochloric
acid.
8
6
14
Which piece of equipment will measure
the volume most accurately?
……………………………………………
A Level Chemistry Holiday Homework
3. Suggest a different piece of equipment (not on the list) that could measure the
volume even more accurately
……………………………….................................................................................
Moles Calculations
1. A sample of a carbohydrate was found to be made up of 40.0 % of carbon, 6.67 %
of hydrogen and 53.3 % of oxygen.
(a) Calculate its empirical formula.
Element symbol
Mass / % composition
Relative atomic mass
(2 marks)
C
40.0
H
6.67
O
53.3
Divide by relative atomic mass (moles)
Divide by the smallest number (whole number ratio)
Formula
(b) The relative molecular mass of the carbohydrate is 150. Work out the molecular
formula of the carbohydrate.
(2 marks)
2. Salicylic acid (C7H6O3) can be used to produce aspirin according to the equation:
C7H6O3 + C4H6O3 → C9H8O4 + CH3COOH
salicylic acid
aspirin
In an experiment a student used 5.0 g of salicylic acid to prepare a sample of aspirin.
(a) What is the maximum mass of aspirin the student could have made? (4 marks)
Help….
formula (molecular) mass of salicylic acid =
formula (molecular) mass of aspirin =
Moles of salicyclic acid = Mass /formula mass =
Moles of salicylcic acid = moles of aspirin
Max mass of aspirin = Moles X formula mass
=
4
A Level Chemistry Holiday Homework