Question

A solution is made by completely dissolving 13.7 grams of potassium phosphate in 185.8 mL of water. What is the concentration of potassium in the solution?

Answer 1

In determining a concentration, we need to convert the result into Grams / Liter

We already have the correct conversion of the weight , now we just need to convert the water volume into Liter :

185.8 / 1000 = 0.1858 L

The concentration is :
weight / volume

= 13.7 gram / 0.1858 L
= 73.73 gram/liter