A solution is made by dissolving 4.87 g of potassium nitrate to a final volume of 86.4 mL solution. What is the weight/volume of the solute?

1 Answer
anor277
Jun 26, 2016

We assume, (i) that the solvent is water, and (ii) that dissolution occurs without change in volume.

Explanation:

So given the standard density of water, the mass of the solution is simply, #(4.87+86.4)*g#. For the solution #"mass"/"volume"="density"(rho)# #=# #((4.87+86.4)*g)/(86.4*mL)#, slightly over #1*g*mL#. Because nitrate salts are soluble stuff, you could get significantly higher solution densities if you dissolved more salt (volume change would be fairly negligible).

Related questions
See all questions in Percent Concentration
Impact of this question
6194 views around the world
You can reuse this answer
Creative Commons License