Name: _______________________________________________
Unit 1 Chemistry past paper
questions
Date:
Time:
Total marks available:
Total marks achieved: ______
,Questions
Q1.
Lithium, Li, is a metal in group 1 of the periodic table.
(i) What is the name given to group 1 of the periodic table?
(1)
A alkali metals
B alkaline earth metals
C halogens
D transition metals
(ii) Lithium has an atomic number of 3.
Complete the electronic configuration of lithium.
(1)
1s........ 2s........
(iii) Write the equation to show the first ionisation energy of lithium.
(2)
.............................................................................................................................................
(Total for question = 4 marks)
Q2.
Oxygen exists as the molecule O2 in the Earth's atmosphere and is needed for combustion.
A student burns magnesium in air to produce 1.40 g of magnesium oxide.
The theoretical yield of magnesium oxide for the experiment is 2.00 g.
(i) Calculate the percentage yield for the student's experiment.
(2)
, percentage yield = ........................................................... %
(ii) Magnesium reacts with oxygen to form magnesium oxide.
2Mg + O2 → 2MgO
2.43 g of magnesium was burned.
Calculate the theoretical yield of magnesium oxide.
(3)
theoretical yield of magnesium oxide = ........................................................... g
(Total for question = 5 marks)
Q3.
Ammonium chloride, ammonium sulfate and ammonium nitrate are used in fertilisers.
Ammonia reacts with nitric acid to make ammonium nitrate.
NH3 + HNO3 → NH4NO3
Calculate the mass of ammonia required to make 5.0 g of ammonium nitrate.
relative formula mass of NH3 = 17
relative formula mass of NH4NO3 = 80
(3)
, mass of ammonia ........................................................... g
(Total for question = 3 marks)
Q4.
Calcium is a metal.
Word equations for two reactions of calcium are shown.
The equation for the reaction of dilute hydrochloric acid with calcium is
Ca + 2HCl → CaCl2 + H2
Calculate the maximum mass of calcium chloride produced by reacting 8.02 grams of
calcium with excess hydrochloric acid.
relative atomic mass: Ca = 40.1
relative formula mass: CaCl2 = 111.1
Show your working.
(3)
Maximum mass = ........................................................... g
(Total for question = 3 marks)
Q5.
Unit 1 Chemistry past paper
questions
Date:
Time:
Total marks available:
Total marks achieved: ______
,Questions
Q1.
Lithium, Li, is a metal in group 1 of the periodic table.
(i) What is the name given to group 1 of the periodic table?
(1)
A alkali metals
B alkaline earth metals
C halogens
D transition metals
(ii) Lithium has an atomic number of 3.
Complete the electronic configuration of lithium.
(1)
1s........ 2s........
(iii) Write the equation to show the first ionisation energy of lithium.
(2)
.............................................................................................................................................
(Total for question = 4 marks)
Q2.
Oxygen exists as the molecule O2 in the Earth's atmosphere and is needed for combustion.
A student burns magnesium in air to produce 1.40 g of magnesium oxide.
The theoretical yield of magnesium oxide for the experiment is 2.00 g.
(i) Calculate the percentage yield for the student's experiment.
(2)
, percentage yield = ........................................................... %
(ii) Magnesium reacts with oxygen to form magnesium oxide.
2Mg + O2 → 2MgO
2.43 g of magnesium was burned.
Calculate the theoretical yield of magnesium oxide.
(3)
theoretical yield of magnesium oxide = ........................................................... g
(Total for question = 5 marks)
Q3.
Ammonium chloride, ammonium sulfate and ammonium nitrate are used in fertilisers.
Ammonia reacts with nitric acid to make ammonium nitrate.
NH3 + HNO3 → NH4NO3
Calculate the mass of ammonia required to make 5.0 g of ammonium nitrate.
relative formula mass of NH3 = 17
relative formula mass of NH4NO3 = 80
(3)
, mass of ammonia ........................................................... g
(Total for question = 3 marks)
Q4.
Calcium is a metal.
Word equations for two reactions of calcium are shown.
The equation for the reaction of dilute hydrochloric acid with calcium is
Ca + 2HCl → CaCl2 + H2
Calculate the maximum mass of calcium chloride produced by reacting 8.02 grams of
calcium with excess hydrochloric acid.
relative atomic mass: Ca = 40.1
relative formula mass: CaCl2 = 111.1
Show your working.
(3)
Maximum mass = ........................................................... g
(Total for question = 3 marks)
Q5.
