Dawn Keckley

Using solutions calculator for making small amounts of solutions of hydrates

Discussion created by Dawn Keckley on Aug 8, 2016
Latest reply on Aug 23, 2019 by Steven Cooke

Hello! Can someone please explain making solutions involving chemicals in hydrate form? I am using a calculator which has worked well for all chemicals except hydrates.


When using this calculator, I obtain different values for making a 1.0 molar solution of CuSO4 pentahydrate than the Flinn Scientific solutions cheat sheet has.

Solution Preparation Calculator


For example, to make a liter of solution, the Flinn Scientific sheet says this:

Copper(II) sulfate1.0 M249.7 g


The calculator says this:

Use 145.6358 grams to prepare: 1000 mL of 1.0 M CuSO4.5H2O


Can someone please clarify?