Question

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2
A student made two solutions - solution A and solution B.
Solution A contained 5 g of copper sulfate in 50 cm³ of water.
Solution B contains 10 g of copper sulfate in 100 cm³ of water.
The student added solution B to solution A.
The student concluded that the new solution is more concentrated
because it has more copper sulfate dissolved in it.
Is the student correct? Explain your answer.
bledo
W
(2 marks)
(3 marks

Answer 1

The student's conclusion is not necessarily correct. The concentration of a solution is determined by the amount of solute (in this case, copper sulfate) present in a given amount of solvent (in this case, water). When the student added solution B to solution A, the total volume of the solution increased from 50 cm³ to 150 cm³, while the total amount of copper sulfate remained constant at 15 g. This means that the concentration of the new solution may be lower than that of the original solutions, since the same amount of solute is now present in a larger volume of solvent. To determine the actual concentration of the new solution, the student would need to measure the amount of copper sulfate present in a given volume of the solution and compare it to the original solutions.