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4.1 Reactivity of metals

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Question 15

A technician has four unlabelled metal samples, P, Q, R and S. The samples are magnesium, zinc, iron and copper, in an unknown order.

The technician adds each sample to dilute hydrochloric acid. The mass and surface area of each metal and the volume, concentration and temperature of the acid are kept the same.

SampleHydrogen after 20 s in cm³Hydrogen after 40 s in cm³Hydrogen after 60 s in cm³
P649498
Q112233
R3711
S000

For a demonstration, the chosen metal must:

  • produce at least 30 cm³ of hydrogen in 60 seconds
  • produce between 10 cm³ and 15 cm³ of hydrogen during each 20-second interval.

Which sample should the technician use? Identify the metal and explain your answer.

[4]
Markscheme

4.1 Reactivity of metals Questions

  1. GCSE
  2. /Chemistry
  3. /4.1 Reactivity of metals

86 exam-style questions on AQA GCSE Chemistry 4.1 Reactivity of metals, covering 4.1.1 Metal oxides, 4.1.2 The reactivity series, 4.1.3 Extraction of metals and reduction, and 4.1.4 Oxidation and reduction in terms of electrons. Each one has a worked solution and a mark scheme showing where the marks go.

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