05 The Periodic Table, Set A To print: Ctrl + P, paper A4, margins Default.
Learners' AlleyDesigned by Khow Willard
05
The Periodic Table
Set AFoundations
Name
Time 1 hour
Total 32 marks
A Data Booklet may be used.
A
From the lesson
10 marks
1
CommonArrange in order of increasing radius: Mg2+, Na+, F−, O2−. Explain.
[2]
Source: Learners' Alley, The Periodic Table slides
2
How would barium react with cold water compared with calcium?
[2]
Source: Learners' Alley, The Periodic Table slides
3
Why is Na+ smaller than Na?
[1]
Source: Learners' Alley, The Periodic Table slides
4
CommonWrite the equation for SiCl4 with water. What is the pH?
[2]
Source: Learners' Alley, The Periodic Table slides
5
Why is BaCO3 more thermally stable than MgCO3?
[2]
Source: Learners' Alley, The Periodic Table slides
6
Will Br2 displace Cl− from aqueous NaCl?
[1]
Source: Learners' Alley, The Periodic Table slides
B
Practice
22 marks
7
Element J is in Period 3 of the Periodic Table. The following three statements are properties of element J or its compounds.
•Adding NaOH(aq) to the solution resulting from the reaction of a chloride of J with water produces a white precipitate which is soluble in an excess of NaOH(aq).•Element J is a solid at room temperature.•The oxide of element J is soluble in hydrochloric acid.
What is the identity of element J?
Amagnesium
Baluminium
Csilicon
Dphosphorus
Answer [1]
Source: IJC 2018 Prelim P1 Q29, via EJC 2022 The Periodic Table Topical Revision, Q4
8
CommonWhat is the correct order of the pH of the resulting solutions when the oxides below are added to water, from lowest pH to highest pH?
ASO3, SiO2, MgO, Na2O
BNa2O, MgO, SiO2, SO3
CMgO, SiO2, SO3, Na2O
DSO3, Na2O, MgO, SiO2
Answer [1]
Source: HCI 2019 Prelim P1 Q27, via EJC 2022 The Periodic Table Topical Revision, Q9
9
CommonThe structures of Period 3 oxides can be simple or giant, and their bonding can be covalent or ionic. Use these terms to describe the structure and bonding in each of the oxides W, X, Y and Z. Explain your reasoning in each case.
oxide
melting point / °C
electrical conductivity when molten
reaction with H2O
resulting pH
W
2850
good
very little
8
X
1720
poor
none
7
Y
1280
good
exothermic
14
Z
580
poor
exothermic
1
[4]
Source: A Level 2007 and 2013 P3 (adapted), via EJC 2022 JC1 The Periodic Table Tutorial, Q1(a)
10
CommonThe pH values of 1.0 mol dm−3 solutions of three Period 3 chlorides are NaCl 7.0, MgCl2 6.5 and AlCl3 3.0.
(a)
By using suitable data from the Data Booklet, suggest explanations for the pH values of the chloride solutions. Include appropriate equations in your answer.
[3]
(b)
Describe the reactions, if any, of the chlorides SiCl4 and PCl5 with water. Include the approximate pH value of any resulting solutions, and write equations for any reactions that occur.
[2]
Source: A Level June 1997 (adapted), via EJC 2022 JC1 The Periodic Table Tutorial, Q4(a)(i) and (b)
11
The same amounts of MgCO3 and BaCO3 were heated separately, and the gas given off was bubbled through a solution X. The time taken for a white precipitate to be observed in X was 3 minutes for MgCO3 and 9 minutes for BaCO3.
(a)
Write an equation, with state symbols, for the thermal decomposition of barium carbonate.
[1]
(b)
State the identity of X and explain the above observations.
[3]
Source: NJC 2011 P3 Q1(d) (modified), via EJC 2022 JC1 The Periodic Table Tutorial, Q6
12
ChallengeExplain each of the following observations in terms of structure and bonding.
(a)
Beryllium chloride (boiling point 547 °C) is much more volatile than magnesium chloride (boiling point 1418 °C).
[4]
(b)
Beryllium oxide is amphoteric, but the oxides of all the other alkaline earth metals are basic.