Solution Formation

A solution is a homogeneous mixture created by dissolving one or more solutes in a solvent. The chemical
present in a smaller amount, the solute, is soluble in the solvent (the chemical present in a larger amount). Solutions with
accurately known concentrations can be referred to as standard (stock) solutions.
Method: The solid solute is weighed out on weighing paper or in a small container and then transferred directly to a
volumetric flask (commonly called a "vol flask"). A funnel might be helpful when transferring the solid into the slim neck
of the vol flask. A small quantity of solvent is then added to the vol flask and the contents are swirled gently until the
substance is completely dissolved. More solvent is added until the meniscus of the liquid reaches the calibration mark on
the neck of the vol flask (a process called “diluting to volume”). The vol flask is then capped and inverted several times
until the contents are mixed and completely dissolved. The disadvantage of this method is that some of the weighed solid
may adhere to the original container, weighing paper, or funnel. Also, solid may be spilled when it is transferred into the
slim neck of the vol flask.