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
Write the word equation for hydrogen peroxide solution decomposing.
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Answer
The word equation for the decomposition of hydrogen peroxide is:
hydrogen peroxide → water + oxygen
Step 2
Draw one straight line from each substance to its correct state symbol.
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Answer
The correct state symbols for each substance in the reaction are:
Hydrogen peroxide solution → (aq)
Liquid water → (l)
Oxygen gas → (g)
This can be represented as:
hydrogen peroxide solution → (aq)
liquid water → (l)
oxygen gas → (g)
Step 3
Describe the test to show the gas produced is oxygen.
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Answer
The test for oxygen involves using a glowing splint. When a glowing splint is introduced into a test tube containing the gas, if it reignites, this confirms the presence of oxygen.
