In this apparatus hydrochloric acid is decomposed by passing a direct electric current through it - Edexcel - GCSE Chemistry - Question 1 - 2013 - Paper 1
Question 1
In this apparatus hydrochloric acid is decomposed by passing a direct electric current through it.
Chlorine and hydrogen are formed.
(i) Give the name of this proce... show full transcript
Worked Solution & Example Answer:In this apparatus hydrochloric acid is decomposed by passing a direct electric current through it - Edexcel - GCSE Chemistry - Question 1 - 2013 - Paper 1
Step 1
Give the name of this process in which substances, such as hydrochloric acid, are decomposed by a direct electric current.
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Answer
The process is called electrolysis.
Step 2
Describe what happens when a burning splint is applied to a mixture of hydrogen and air in a test tube.
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Answer
When a burning splint is applied to a mixture of hydrogen and air, it will produce a characteristic 'pop' sound. This is due to the rapid combustion of hydrogen in the presence of oxygen from the air.
Step 3
Which of these could cure indigestion caused by excess acid? Put a cross (X) in the box next to your answer.
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Answer
The correct answer is C calcium carbonate.
Step 4
Explain how an indigestion remedy works when it cures acid indigestion.
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Answer
An indigestion remedy, such as calcium carbonate, works by neutralizing excess stomach acid. It reacts with the acid, reducing its concentration and thereby increasing the pH, which alleviates the discomfort of indigestion.
Step 5
Complete the word equation for the reaction of magnesium oxide with nitric acid.
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Answer
The completed word equation is:
magnesium oxide + nitric acid → magnesium nitrate + water.
