Unit 2 Review - Molarity & Molality

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What is molarity?

Back

Molarity is a measure of the concentration of a solute in a solution, expressed as moles of solute per liter of solution (mol/L).

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What is molality?

Back

Molality is a measure of the concentration of a solute in a solvent, expressed as moles of solute per kilogram of solvent (mol/kg).

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What does an unsaturated solution mean?

Back

An unsaturated solution is one that contains less solute than it has the capacity to dissolve at a given temperature.

Front

What are the components of sodium hydroxide (NaOH)?

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Sodium hydroxide is composed of sodium (Na), oxygen (O), and hydrogen (H).

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How do you calculate molality?

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Molality (m) = moles of solute / kilograms of solvent.

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How do you convert grams to moles?

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To convert grams to moles, divide the mass of the substance (in grams) by its molar mass (in g/mol).

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What is the molarity of a solution with 2 moles of solute in 1 liter of solution?

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The molarity is 2 mol/L.

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What is the relationship between concentration and solute amount?

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Higher concentration means more solute is present in a given volume of solution.

Front

What is the formula for calculating the number of moles?

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Number of moles = mass (g) / molar mass (g/mol).

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What is the significance of Avogadro's number?

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Avogadro's number (6.022 x 10^23) is the number of particles (atoms, molecules, etc.) in one mole of a substance.