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Which of the following pairs of substances contains one substance that is soluble in water and one that is insoluble in water? Put a cross (×) in the box next to your answer - Edexcel - GCSE Chemistry - Question 4 - 2014 - Paper 1
Question 4
Which of the following pairs of substances contains one substance that is soluble in water and one that is insoluble in water? Put a cross (×) in the box next to yo... show full transcript
Worked Solution & Example Answer:Which of the following pairs of substances contains one substance that is soluble in water and one that is insoluble in water? Put a cross (×) in the box next to your answer - Edexcel - GCSE Chemistry - Question 4 - 2014 - Paper 1
Step 1
Which of the following pairs of substances contains one substance that is soluble in water and one that is insoluble in water?
Answer
Based on solubility rules, we know that:
- Aluminium nitrate is soluble in water.
- Lead sulfate is insoluble in water.
Thus, the correct choice is:
A. aluminium nitrate and lead sulfate.
Step 2
An explanation linking two of the following
Answer
Barium chloride, as an ionic compound, has strong electrostatic forces between the positively charged barium ions and negatively charged chloride ions. These strong ionic bonds require considerable heat energy to break. Therefore, barium chloride has a high melting point due to the strength of these ionic interactions.