Sodium sulfate is an ionic solid which is soluble in water - Edexcel - GCSE Chemistry - Question 2 - 2016 - Paper 1
Question 2
Sodium sulfate is an ionic solid which is soluble in water.
(a) Which row of the table shows the likely properties of sodium sulfate?
Put a cross (X) in the box to ... show full transcript
Worked Solution & Example Answer:Sodium sulfate is an ionic solid which is soluble in water - Edexcel - GCSE Chemistry - Question 2 - 2016 - Paper 1
Step 1
Which row of the table shows the likely properties of sodium sulfate?
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Answer
The correct row is C, which shows a melting point of 884 °C and states that it conducts electricity when dissolved in water. Sodium sulfate, being an ionic compound, has a high melting point and conducts electricity when its ions are free to move in solution.
Step 2
Complete the sentence by putting a cross (X) in the box next to your answer.
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Answer
The formula for sodium sulfate is A: NaSO<sub>4</sub>. Sodium sulfate consists of one sodium ion and one sulfate ion.
Step 3
Which colour in the flame shows the presence of sodium ions?
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Answer
The flame test for sodium ions shows a yellow color. Therefore, the correct answer is D: yellow.
