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Questions and Answers
What is the unit of molarity?
Which of the following is NOT necessary to calculate molarity?
What is the molarity of a solution that contains 3 moles of solute in 2 liters of solution?
What is the main advantage of using molarity as a concentration unit?
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What is the formula to calculate molarity?
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Study Notes
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
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Description
Test your knowledge on molarity, a measure of concentration of a solution, including its definition, formula, units, and calculation.
