Application of Colligative Properties

Multiple Choice

What kind of solution is salt?

• Ideal

• Non-ideal

• Can be both ideal and non-ideal

• It is not a solution.

Dropdown

The total vapor pressure is the same as predicted by Raoult’s law​

Select answer

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The total vapor pressure increases or decreases from the predicted value according to Raoult’s law ​

Select answer

Drag and Drop

No heat is released or absorbed, so the enthalpy of mixing is zero​

Placeholder

Heat is either absorbed or released​

Placeholder

Drag these tiles and drop them in the correct blank above

Ideal

Non-ideal

Multiple Choice

What is K_b?

• molal boiling point elevation constant

• boiling point elevation

• van’t Hoff factor

• molal concentration of solute particles

Multiple Select

$$\Delta T_b$$ can be solved by...

• Subtracting T_b of solvent from T_b of solution

• Subtracting T_f of solvent from T_f of solution

• Multiplying molal boiling point elevation constant with molality

• T_{b, solvent} - T_{b, solution}

Multiple Choice

Review. Which of the following is the formula for molality (m)?

EVALUATION

​Answer on sheets of whole paper

Reorder

Arrange the following steps on how to titrate for an unknown vinegar concentration

• Add a sample vinegar into a beaker.

• Withdraw 10.0 mL of vinegar from the 25.0 mL and transfer it to a 250 mL Erlenmeyer flask. Dilute to 50 mL with water.

• Add 1 drop of phenolphthalein as indicator.

• Titrate to the end point (solution must have a permanent faint pink color) with the standardized NaOH solution.

• Calculate the mass of acetic acid (CH3COOH) in the vinegar solution.

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