The suggested mark is a cautious word match, not an official mark. Accept scientifically equivalent wording when you self-mark, as an examiner would.
0 of 33 questions marked.
Earlier foundation: C4.11 Making salts
33 questions · 167 marks, in lesson order.
Acids and metals
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Equal-sized strips of magnesium and zinc are added to identical hydrochloric acid. Magnesium produces hydrogen faster.
Explain what this shows about the reactivity of magnesium and zinc.
(3)State two variables that must be controlled.
(2)Total for this question: 5 marks
Acids and metals
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Sasha placed small samples of copper, iron, magnesium and zinc on a spotting tile and added drops of calcium nitrate solution to each metal. She repeated the experiment with fresh samples of the four metals and copper nitrate solution, then with iron nitrate solution. The reactivity series, most reactive first, is: calcium, magnesium, aluminium, zinc, iron, lead, copper.
Will a reaction take place when each metal is added to calcium nitrate solution?
(1)Copper with copper nitrate gives no reaction. Will a reaction take place when each of the other metals is added to copper nitrate solution?
(1)Iron with iron nitrate gives no reaction. Will a reaction take place when each of the other metals is added to iron nitrate solution?
(1)A reaction only takes place with two of these pairs. Choose the result for each pair.
(2)Total for this question: 5 marks
Acids and metals
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The word equation for the reaction between magnesium carbonate and hydrochloric acid is: magnesium carbonate + hydrochloric acid → magnesium chloride + carbon dioxide + water
Sadiq added hydrochloric acid to magnesium carbonate in a flask. Suggest the pH of hydrochloric acid.
(1)The carbon dioxide produced was bubbled through limewater. How would the limewater change?
(1)Sadiq repeated the experiment by adding sulfuric acid to magnesium carbonate. Complete the word equation.
(1)magnesium carbonate + sulfuric acid → + carbon dioxide + water
Sadiq made a model volcano. He put magnesium carbonate into the model and added vinegar and a drop of washing-up liquid. The mixture fizzed, and froth poured out of the model volcano. Suggest the pH of vinegar.
(1)The froth running down the side of the model represents part of a real volcano. Give the name of this part.
(1)Total for this question: 5 marks
Acids and metals
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Ruth put a piece of a different metal in each of four test tubes. She poured 10 cm³ of hydrochloric acid onto each metal.
How do the diagrams show if a metal reacts with the acid?
(1)Put the four metals in order of how strongly they react with the acid.
(1)Which metal from copper, iron, magnesium and zinc is used for electrical wires?
(1)Which metal from copper, iron, magnesium and zinc goes rusty?
(1)Total for this question: 4 marks
Chemical reactions of metals and non-metals
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Magnesium reacts with chlorine to form magnesium chloride, MgCl₂.
Describe the electron transfer that forms the ions.
(3)Explain the bonding and the formula MgCl₂.
(2)Total for this question: 5 marks
Chemical reactions of metals and non-metals
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Two elements were burned in oxygen and the oxides were added to water with universal indicator. Element P: the oxide is a white solid and the solution has pH 11. Element Q: the oxide is a colourless gas and the solution has pH 3. (Illustrative results.)
Which element is a metal?
(1)Explain your answer using the results.
(1)Suggest the name of element Q.
(1)Complete the word equation.
(1)magnesium + oxygen →
What type of reaction is this?
(1)Total for this question: 5 marks
Metals and oxygen
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A student heats magnesium in a crucible. The mass of the solid increases.
Explain why the mass of the solid increases.
(3)Suggest two reasons the measured mass gain may be inaccurate.
(2)Total for this question: 5 marks
Metals and oxygen
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Jill bought a can of Wax Seal to spray the parts underneath her car. Wax Seal helps to prevent these parts rusting. It is a mixture of wax and a liquid called white spirit.
The body of Jill’s car is made from steel. Steel contains iron. Give two substances that are needed for iron to rust.
(2)1: 2:
How does Wax Seal help to protect the car from rusting?
(1)Wax Seal can also be used on the upper parts of a car. What else protects parts such as the doors from rusting?
(1)The metal parts of a car may corrode. What type of air pollution could cause corrosion?
(1)After Jill sprays the car, the white spirit evaporates, leaving a layer of solid wax. Which describes the arrangement of particles in a gas?
(1)Which describes the arrangement of particles in a solid?
(1)Total for this question: 7 marks
Metals and water
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Calcium, magnesium and copper are tested with cold water and with steam.
Compare the reactions of the three metals with water and steam.
(4)Deduce the order of reactivity.
(1)Total for this question: 5 marks
Metals and water
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Calcium, magnesium and copper were added to cold water. Calcium fizzed steadily. Magnesium produced a few bubbles after a day. Copper showed no change.
Put the metals in order of reactivity, most reactive first.
(2)Describe a test to show that the gas from calcium is hydrogen, and give the result.
(2)Why are copper pipes, rather than magnesium pipes, used for hot water?
(1)Total for this question: 5 marks
Metal displacement reactions
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Zinc powder is added to blue copper sulfate solution.
Explain why a reaction happens.
(2)Explain what happens to the particles and what is observed.
(3)Total for this question: 5 marks
Metal displacement reactions
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A group of pupils placed pieces of metal wire in different salt solutions and recorded their observations.
| experiment | wire | solution | observations |
|---|---|---|---|
| 1 | copper | silver nitrate | crystals of silver formed on the wire |
| 2 | zinc | lead nitrate | crystals of lead formed on the wire |
| 3 | copper | lead nitrate | no change |
From these observations, put the four metals copper, lead, silver and zinc in order of reactivity.
(2)The pupils then dipped a new piece of each of the metal wires into dilute hydrochloric acid. Only one of the metals reacted. Which metal was this?
(1)One pupil predicted that there would be no reaction when he put a piece of zinc wire into a solution of silver nitrate. Was his prediction correct?
(1)In nature, gold is never found combined with other elements. Where should gold be placed in the reactivity series in part (a)? Explain your answer.
(1)Total for this question: 5 marks
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