MOLARITY Lim, Parker, Drontle, Barker, Kashner
Instructions:

Here's How to .....make a solution of a particular molarity.

CONCEPT: Molarity defines the concentration of a solution. To make molarity measurable one needs to convert formula weight of the chemical substance into grams. The weight of this unit is known as a mole (Avogadro's Number). Unlike the mole pictured to the left, in a chemical mole there are 6.02 x 10 23 atoms.

 Wear your gloves and goggles and label all solutions!

 To make a 1Molar solution of a compound...Determine the mass required for one liter of the solution as follows: To determine the mass, find the formula weight for the compound. Ex. for NaCl the FW is 58, combine the atomic mass of Na (23) and Chlorine(35) = 58 grams
 Balances need to be zeroed - with the empty weighing pan on the balance, push the tare button.Weigh out the required mass (in the example above 58 grams of NaCl is necessary for an 1 molar solution). Place desired mass into a beaker or flask.
 Add about 80% of the total amount of distilled water to the beaker, stir and heat until dissolved.

 To finish, add enough distilled water to the beaker to reach the final volume needed.Reduce mass proportionally to the amount of volume needed. Example: If you need 100ml of solution, mass would be 5.8 grams of NaCl 50 ml solution, mass = 2.9 grams of NaCl
 Web Source: http://environmentalchemistry.com/yogi/chemistry/MolarityMolalityNormality.html