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Questions and Answers
In the context of concentration, what are the majority and minority components referred to as?
In the context of concentration, what are the majority and minority components referred to as?
- Solution and solvent
- Solvent and solutes (correct)
- Solute and solution
- Solute and solvent
What is the definition of a solution in analytical chemistry?
What is the definition of a solution in analytical chemistry?
- A mixture of two or more components with different physical states
- A mixture with uneven distribution of components
- A mixture of two or more components with visible boundaries
- A homogenous mixture of two or more components (correct)
What is the definition of molarity in analytical chemistry?
What is the definition of molarity in analytical chemistry?
- $M = \frac{\text{grams of solute}}{\text{liters of solution}}$
- $M = \frac{\text{moles of solute}}{\text{grams of solvent}}$
- $M = \frac{\text{moles of solvent}}{\text{liters of solution}}$
- $M = \frac{\text{moles of solute}}{\text{liters of solution}}$ (correct)
What is the unit for expressing concentration?
What is the unit for expressing concentration?
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What is the molarity of the AgNO3 solution prepared by dissolving 1.26 g AgNO3 in a 250 ml volumetric flask?
What is the molarity of the AgNO3 solution prepared by dissolving 1.26 g AgNO3 in a 250 ml volumetric flask?
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Study Notes
Concentration in Analytical Chemistry
- In the context of concentration, the majority component is referred to as the solvent, while the minority component is referred to as the solute.
Definition of a Solution
- A solution is a homogeneous mixture composed of two or more substances, where one substance (the solute) is dissolved in another substance (the solvent).
Definition of Molarity
- Molarity is the number of moles of solute per liter of solution, expressed in units of moles per liter (mol/L) or molarity (M).
Unit for Expressing Concentration
- Concentration is typically expressed in units of molarity (M), which represents the number of moles of solute per liter of solution.
Example Calculation: Molarity of AgNO3 Solution
- The molarity of the AgNO3 solution prepared by dissolving 1.26 g AgNO3 in a 250 ml volumetric flask can be calculated as follows:
- First, calculate the number of moles of AgNO3: moles = mass / molar mass = 1.26 g / 169.87 g/mol = 0.0074 mol
- Then, calculate the molarity: molarity = moles / liter = 0.0074 mol / 0.25 L = 0.0296 M or approximately 0.03 M
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