Question

In 1L of a 3M solution of sodium chloride, how many grams of sodium chloride are in the solution?

Answer 1

`"175.35 g"`

Explanation:

A `"3 M"` solution has `3` moles of solute per litre.

The mass of one mole of `"NaCl"` equals the MW of `"NaCl"`

`"MW" = 35.45 + 23 = "58.45 g/mol"`

The mass of `3` moles is

`"58.45 g/mol" xx "3 mol" = "175.35 g NaCl"`

or `"200 g"` rounded to one sigfig.