Figure 9 shows a sample of hydrogen peroxide solution decomposing to form water and oxygen gas - Edexcel - GCSE Chemistry - Question 6 - 2021 - Paper 1
Question 6
Figure 9 shows a sample of hydrogen peroxide solution decomposing to form water and oxygen gas.
(a) (i) Write the word equation for hydrogen peroxide solution decom... show full transcript
Worked Solution & Example Answer:Figure 9 shows a sample of hydrogen peroxide solution decomposing to form water and oxygen gas - Edexcel - GCSE Chemistry - Question 6 - 2021 - Paper 1
Step 1
(i) Write the word equation for hydrogen peroxide solution decomposing.
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Answer
The word equation for the decomposition of hydrogen peroxide solution is:
hydrogen peroxide → water + oxygen
Step 2
(ii) In this reaction hydrogen peroxide is a solution, water is a liquid and oxygen is a gas. Draw one straight line from each substance to its correct state symbol.
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Answer
Here are the correct state symbols for each substance:
Hydrogen peroxide solution (aq)
Liquid water (l)
Oxygen gas (g)
Step 3
(b) Describe the test to show the gas produced is oxygen.
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Answer
To test for oxygen, a glowing splint can be used. When the splint is placed in the presence of oxygen, it will reignite, indicating that the gas produced is indeed oxygen.
