What is Concentration?
In a solution, concentration is a measure of the number of particles of the solute in the solvent. A concentrated solution will have a large number of solute particles. A dilute solution will have a smaller number of solute particles. Saying something is concentrated or dilute is not very precise, so we have ways to get an exact measure of the concentration which are molarity and molality.
Molarity is a measure of concentration.
- Molarity: The number of moles of solute in 1 liter of a solution
- Defined as mol/L
- Units are the following: M
- The unit must be uppercase.
- Convert the solute's mass into moles using the substances molar mass.
- Divide the number of moles of the substance by the number of liters.
- Ensure proper units are used.
Molarity of Sugar in Drinks
Molarity is calculated in units of moles/Liter, so we can use the following conversions to get molarity of sugar in drinks:
- Molar Mass of Glucose (Sugar) = 180.1559 grams/moles
- 1 fl.oz. = 0.0295735 Liters
- 1000 mg = 1 g
- 1000 mL = 1 L
Example: Finding the Sugar Molarity of Red Bull
Example: Finding the caffeine molarity in Coca-Cola
You can use this process to determine other molarity's in liquid foods and beverages, such as salt and caffeine.