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4 (a) 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 (X) in the box next to your answer - Edexcel - GCSE Chemistry - Question 4 - 2014 - Paper 1
Question 4
4 (a) 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 (X) in the box next... show full transcript
Worked Solution & Example Answer:4 (a) 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 (X) 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
The correct answer is A: aluminium nitrate and lead sulfate.
Explanation:
- Aluminium nitrate is soluble in water, while lead sulfate is not soluble. This means that option A consists of one soluble and one insoluble substance.
Step 2
An explanation linking two of the following
Answer
Barium chloride being an ionic compound is characterized by strong electrostatic forces of attraction between positively and negatively charged ions.
To form barium chloride, barium ions and chloride ions come together; these bonds require a lot of energy to break due to the strong ionic attraction, which contributes to its high melting point.