The table shows some properties of six compounds - Edexcel - GCSE Chemistry - Question 1 - 2012 - Paper 1
Question 1
The table shows some properties of six compounds.
| compound | melting point / °C | boiling point / °C | solubility in water | electrical conducti... show full transcript
Worked Solution & Example Answer:The table shows some properties of six compounds - Edexcel - GCSE Chemistry - Question 1 - 2012 - Paper 1
Step 1
Which of the following lists of compounds from the table contains only ionic compounds?
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Answer
The correct answer is C: copper sulfate and sodium chloride. This is because both compounds are ionic. Copper sulfate dissociates into copper ions and sulfate ions, and sodium chloride dissociates into sodium and chloride ions in solution.
Step 2
Give the name of one of these compounds and the colour it produces in the flame test.
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Answer
One of the compounds is copper sulfate, which produces a blue-green colour in the flame test. Alternatively, sodium chloride can be another answer, which produces a yellow colour.
