Molarity: Concentration of Solutions Quiz

Molarity

Molarity is a measure of the concentration of a solution.

Definition:

Molarity (M) is the number of moles of solute per liter of solution.

Formula:

Molarity (M) = Number of moles of solute / Liter of solution (L)

M = n / L

Units:

• Molarity is expressed in units of moles per liter (mol/L)
• Often denoted by the symbol "M" (e.g., 1M, 2M, etc.)

Calculation:

To calculate molarity, you need to know:

• The number of moles of solute (n)
• The volume of the solution in liters (L)

Example:

• 2 moles of NaCl (solute) dissolved in 1 liter of water (solution)
• Molarity = 2 mol / 1 L = 2M

Key Points:

• Molarity is a concentration unit that depends on the volume of the solution
• It is a useful way to express the concentration of a solution in a laboratory setting
• Molarity is often used in stoichiometric calculations and in chemical reactions

Molarity

• Molarity is a measure of the concentration of a solution, defined as the number of moles of solute per liter of solution.

Formula and Units

• Molarity (M) is calculated by dividing the number of moles of solute (n) by the liter of solution (L): M = n / L
• Expressed in units of moles per liter (mol/L), often denoted by the symbol "M" (e.g., 1M, 2M, etc.)

Calculation Requirements

• To calculate molarity, you need to know the number of moles of solute (n) and the volume of the solution in liters (L)

Example Calculation

• 2 moles of NaCl (solute) dissolved in 1 liter of water (solution) has a molarity of 2M (2 mol / 1 L)

Key Characteristics and Applications

• Molarity is a concentration unit that depends on the volume of the solution
• It's a useful way to express the concentration of a solution in a laboratory setting
• Molarity is often used in stoichiometric calculations and chemical reactions