Question

How many grams of medicine are contained in 0.75L of a 1:500 solution?

1.5 g

0.67 g

1.5 mg

none of the above

Answer 1

So the solution in 1:500 . So, in 500 parts of sovent, 1 part of solute is dissolved to make the solution.

So if 500L solvent is taken, 1 L of solute will be present.

In 1L, (1/500) L of solute is present.

In 0.75L, (1/500) ×0.75L of solute is present ie 0.0015L Or 1.5ml.(1L is 1000ml).

If we take density of water, then 1ml of water is equals to 1g of water.Since, density of medicine is not given, so, 1.5 ml of medicine equals to 1.5g of medicine. So, 1.5g is the correct option.