Chemistry: Acids, Reactions and the Periodic Table - Worksheets, Questions and Revision

18 original exam-style questions - 10 pages of questions with a full mark scheme - free printable PDF.

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13+ · Chemistry

CE.S-C2 Chemistry: Acids, Reactions and the Periodic Table

ISEB CE ISEB CE 13+ Science (Chemistry) · Calculator allowed · about 60 minutes
Total Marks
Name: _______________________________    Date: ____ / ____ / ______
Answer ALL questions. Show all your working.
1
The pH scale is used to measure how acidic or alkaline a solution is.
(a)State whether a solution with pH 1 is acidic, neutral or alkaline.(1)
(b)State whether a solution with pH 7 is acidic, neutral or alkaline.(1)
(c)State whether a solution with pH 9 is acidic, neutral or alkaline.(1)
(d)State whether a solution with pH 13 is acidic, neutral or alkaline.(1)
(Total for Question 1 is 4 marks)
2
Universal indicator solution changes colour depending on the pH of a solution. The table below shows some pH ranges and their colours, with some colours missing.
pH range: 1-3, 4-6, 7, 8-10, 11-14
Colour: ?, yellow/orange, ?, blue, ?
(a)State the colour of universal indicator at pH 1-3.(1)
(b)State the colour of universal indicator at pH 7.(1)
(c)State the colour of universal indicator at pH 11-14.(1)
(d)Name one other common indicator, apart from universal indicator, that can be used to test whether a solution is acidic or alkaline.(1)
(Total for Question 2 is 4 marks)
3
Priya is about to carry out an experiment using dilute hydrochloric acid in the school laboratory.
(a)Name one piece of safety equipment Priya should wear when handling the acid.(1)
(b)The acid bottle carries a hazard symbol showing a hand and a surface being corroded by drops of liquid. State what this hazard symbol means.(1)
(c)State why Priya should wear eye protection when using this acid.(1)
(Total for Question 3 is 3 marks)
4
The periodic table arranges all the known chemical elements in a grid.
(a)State the name given to the horizontal rows of the periodic table.(1)
(b)State the name given to the vertical columns of the periodic table.(1)
(c)State which side of the periodic table (left or right) the metals are found on.(1)
(d)State which side of the periodic table (left or right) the non-metals are found on.(1)
(Total for Question 4 is 4 marks)
5
Group 1 of the periodic table contains a family of very reactive metals, which includes sodium and potassium.
(a)State the name given to this family of metals.(1)
(b)Complete the word equation for the reaction between sodium and water: sodium + water -> ___ + ___(2)
(c)Tom watches his teacher safely demonstrate a small piece of sodium reacting with water in a large trough. State two observations Tom would make.(2)
(Total for Question 5 is 5 marks)
6
Freya adds a small amount of chlorine water to a solution of potassium bromide.
(a)State the observation Freya would see.(1)
(b)Complete the word equation for this reaction: chlorine + potassium bromide -> ___ + ___(2)
(c)Explain why chlorine is able to displace bromine from potassium bromide solution.(2)
(Total for Question 6 is 5 marks)
7
Jamal adds small pieces of four metals to separate test tubes of dilute hydrochloric acid and records his observations.
Magnesium: vigorous fizzing; the gas quickly pops with a lit splint.
Zinc: a steady stream of bubbles.
Iron: very slow reaction; only a few bubbles seen.
Copper: no bubbles seen; no reaction.
(a)Using Jamal's observations, list the four metals in order of reactivity, from most reactive to least reactive.(2)
(b)Explain how the rate of bubble production in each test tube is linked to the reactivity of the metal.(2)
(Total for Question 7 is 4 marks)
8
Complete the word equations for the reactions between each metal and an acid, then answer parts (d) and (e).
(a)magnesium + hydrochloric acid -> ___ + ___(1)
(b)zinc + sulfuric acid -> ___ + ___(1)
(c)iron + hydrochloric acid -> ___ + ___(1)
(d)Name the gas produced in all three reactions.(1)
(e)Describe a test for this gas, including the result of a positive test.(1)
(Total for Question 8 is 5 marks)
9
Calcium carbonate (marble chips) reacts with dilute hydrochloric acid.
(a)Complete the word equation: calcium carbonate + hydrochloric acid -> ___ + ___ + ___(2)
(b)Describe how you would test for the gas produced in this reaction, and state the result of a positive test.(2)
(Total for Question 9 is 4 marks)
10
Neutralisation reactions between acids and bases produce a salt and water. Name the salt formed in each reaction.
(a)hydrochloric acid + sodium hydroxide -> ___ + water(1)
(b)sulfuric acid + copper oxide -> ___ + water(1)
(c)nitric acid + potassium hydroxide -> ___ + water(1)
(d)Write the general word equation for a neutralisation reaction between an acid and a base.(2)
(Total for Question 10 is 5 marks)
11
Oliver investigates the reaction between excess dilute hydrochloric acid and marble chips by measuring the total volume of carbon dioxide gas produced over time.
Time (s): 0, 20, 40, 60, 80, 100, 120
Volume of gas (cm3): 0, 18, 32, 42, 48, 50, 50
(a)Calculate the mean rate of reaction between 0 and 60 seconds, in cm3/s.(2)
(b)State the time at which the reaction finished, and explain how you know this from the data.(2)
(c)Explain, in terms of particles, why the rate of reaction decreases as the experiment proceeds (before it stops).(2)
(Total for Question 11 is 6 marks)
12
Balance each of the following symbol equations.
(a)Mg + HCl -> MgCl2 + H2(2)
(b)Na + O2 -> Na2O(2)
(c)CaCO3 -> CaO + CO2. State whether this equation is already balanced, and justify your answer by counting atoms.(2)
(Total for Question 12 is 6 marks)
13
Three unlabelled test tubes, A, B and C, each contain one of the gases hydrogen, oxygen and carbon dioxide.
(a)Describe the test for hydrogen gas, including the result of a positive test.(2)
(b)Describe the test for oxygen gas, including the result of a positive test.(2)
(c)Describe the test for carbon dioxide gas, including the result of a positive test.(2)
(Total for Question 13 is 6 marks)
14
Chlorine has an atomic number of 17 and a mass number of 35.
(a)State the number of protons in an atom of chlorine.(1)
(b)State the number of electrons in a neutral atom of chlorine.(1)
(c)Calculate the number of neutrons in an atom of chlorine.(2)
(d)State the group and period in which chlorine is found in the periodic table.(1)
(e)State why elements in the same group of the periodic table have similar chemical properties.(1)
(Total for Question 14 is 6 marks)
15
Four metals, zinc, iron, copper and gold, are each tested by adding a piece of the metal to copper sulfate solution and to zinc sulfate solution.
Zinc in copper sulfate solution: reaction occurs (blue colour fades, a pink-brown coating forms).
Iron in copper sulfate solution: reaction occurs (blue colour fades, a pink-brown coating forms).
Copper in zinc sulfate solution: no reaction.
Gold in copper sulfate solution: no reaction.
(a)Using these results, place the four metals in order of reactivity, from most reactive to least reactive.(2)
(b)Explain why gold does not react in either test.(2)
(c)Suggest why gold is a suitable metal for making jewellery, using ideas about reactivity.(2)
(Total for Question 15 is 6 marks)
16
2.4 g of magnesium ribbon reacts completely with excess dilute hydrochloric acid and produces 2400 cm3 of hydrogen gas, measured at room temperature and pressure.
(a)Calculate the volume of hydrogen gas that would be produced when 3.6 g of magnesium reacts completely with excess dilute hydrochloric acid, at the same temperature and pressure.(3)
(b)State one assumption you have made in this calculation.(1)
(Total for Question 16 is 4 marks)
17
A newly discovered element, X, is a solid at room temperature. It reacts vigorously with water, producing a gas that pops with a lit splint. It also reacts with chlorine to form an ionic compound with the formula XCl.
Using your knowledge of the periodic table and group trends, suggest which group of the periodic table element X belongs to, and justify your answer. Your answer should include a word equation for the reaction of X with water.
(Total for Question 17 is 6 marks)
18
A student measures the volume of gas produced 30 seconds after starting the reaction between excess marble chips and dilute hydrochloric acid. She repeats the experiment three times, recording 24 cm3, 35 cm3 and 26 cm3.
(a)Identify the anomalous result.(1)
(b)Suggest one reason why this result might be anomalous.(1)
(c)Explain why the anomalous result should be excluded, and calculate the new mean volume of gas using the two remaining readings.(2)
(d)Suggest one way the student could improve the reliability of her results.(1)
(Total for Question 18 is 5 marks)
Mark scheme · CE.S-C2 Chemistry: Acids, Reactions and the Periodic Table

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Question 10

Question 11

Question 12

Question 13

Question 14

Question 15

Question 16

Question 17

Question 18