Question

A chemistry student needs 65.0g heptane for an experiment. He has available 20.0g of a 38.1% w/w solution of heptane in chloroform.Calculate the mass of solution the student should use.

Answer 1

The question is incomplete, here is the complete question:

A chemistry student needs 65.0 g heptane for an experiment. He has available 20.0 g of a 38.1% w/w solution of heptane in chloroform.

Calculate the mass of solution the student should use. If there's not enough solution, press the "No solution" button.  Round your answer to 3 significant digits.

Answer: The solution is not enough, "No Solution"

Explanation:

We are given:

Mass of solution needed = 20.0 g

38.1 % (w/w) solution of heptane

This means that 38.1 grams of heptane is present in 100 grams of solution

Applying unitary method:

If 38.1 grams of heptane is present in 100 g of solution

So, 65.0 grams of heptane will be present in = $\frac{100}{38.1}\times 65.0=170.6g$ of solution

As, the given amount of solution is less than the required solution. So, there is not enough solution

Hence, the solution is not enough, "No Solution"