1. Sodium carbonate and copper chloride are both ionic solids - Edexcel - GCSE Chemistry - Question 1 - 2013 - Paper 1
Question 1
1. Sodium carbonate and copper chloride are both ionic solids.
They are both soluble in water.
a) Which row of the table shows the most likely melting points of the... show full transcript
Worked Solution & Example Answer:1. Sodium carbonate and copper chloride are both ionic solids - Edexcel - GCSE Chemistry - Question 1 - 2013 - Paper 1
Step 1
a) Which row of the table shows the most likely melting points of these two salts?
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Answer
The most likely melting points of sodium carbonate and copper chloride are presented in option C:
Sodium carbonate: 851 °C
Copper chloride: 498 °C
Thus, you would indicate this by placing a cross (X) in box C.
Step 2
b) Give the formula of copper chloride.
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Answer
The formula for copper chloride, which contains copper ions (Cu²⁺) and chloride ions (Cl⁻), is CuCl₂.
Step 3
c) If a flame test is carried out on copper chloride, the colour in the flame is
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Answer
The correct answer is option D: green-blue. This indicates that when a flame test is conducted on copper chloride, it will produce a green-blue flame.
