Today we’ll start to talk about how to prepare a solution. We need to remember that solutions are formed mixing a solute, which is usually a solid, for example sodium chloride, and a Solvent which is usually water.
To measure water we use special materials as beakers and graduated cylinders, but they just give us an approximate amount of liquid, so even when they have scales about the amount that we are measuring with them, they are not exact.
Volumetric Flasks, give us an exact amount of liquid, and when we prepare solutions they represent the final amount of the solution, as for example 100 mL or 25 mL.
When we finish preparing the solutions, we storage them. We label these bottles with the Concentration, name, date and MSDS code for the solution. Most of the storage bottles are made of glass but some solutions require plastic materials, as for example Sodium Hydroxide or Hydrofluoric acid solutions.