Calculate the mass of salt and water that you need to take to prepare 750 g of a 2% solution.

The total mass of such a solution will be 750 grams.

Of this mass, 2% will weigh salt, and 98% will weigh water.

Let’s find the mass of salt and water:

M salt = 750 x 2% = 15 grams;

M water = 750 x 98% = 735 grams;

Check: 15 + 735 = 750 grams;

Bulk substances are weighed on a balance, liquids are measured with a graduated cylinder.

Therefore, to prepare this solution, you need to measure 735 milliliters of water (the density of water is 1 gram / cm3) and weigh 15 grams of salt on the scales.