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Calculations involving masses

Calculations involving masses

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Question 7

Zinc reacts with oxygen from the air to form zinc oxide.

A student carries out an investigation to determine the mass of zinc oxide formed when a known mass of zinc reacts completely with oxygen.

This is the method the student used.

Step 1 Find the mass of an empty crucible and lid. Step 2 Put a known mass of zinc powder into the crucible and put the lid on. Step 3 Heat the crucible strongly for five minutes using a roaring Bunsen burner flame, lifting the lid occasionally. Step 4 Let the crucible, lid, and contents cool down. Step 5 Find the final mass of the crucible, lid, and contents.

Explain how the student could check that the zinc had reacted completely with oxygen.

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Markscheme

Calculations involving masses Questions

  1. GCSE
  2. /Chemistry
  3. /Calculations involving masses

258 exam-style questions on Edexcel GCSE Chemistry Calculations involving masses. Each one has a worked solution and a mark scheme showing where the marks go.

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