Solutions and Molarity

Solutions are homogeneous mixtures composed of a solute & a solvent
Solute: is the chemical present in lesser amount
(whatever is dissolved)
Solvent: the chemical present is the greater amount


Molarity


Concentration can be expressed in many ways. g/L, g/mL,mol/L, etc..

• But the most common is Molarity mol/L= M
• [HCL] concentration of HCl
• [NaCl] concentration of NaCl

Heres a video that teaches you how to calculate molarity problems :)

Molarity= moles    

                Volume

Example:

What is the concentration of a Sodium chloride solution made from 0.75 mol of NaCl dissolved in 250 mL of water?

0.75 mol x     1      =   30 mol/L

Example:

What is the concentration of the solution when 2.75g of Sodium Carbonate are dissolved in 50 mL of water?

2.75g x     1   mol    = 0.0259

                 106 g      = 0.0260