Unit 4a Basic Knowledge Quiz

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2. Moles = _____ / molecular mass

Moles

Molar mass

Mass

Mr Canning

3. Molality = moles / kg of ______

Solute

Sevilla

Solvent

4. Osmotic pressure is the pressure required to stop the process of osmosis from occuring.

True

False

5. What is the cryoscopic constant for water?

18.6

1.86

186

0.186

6. Kb is called the ___________ constant.

Boilingoscopic

Ebulliarscopic

Ebullioscopic

Bulloscopic

7. Osmosis is the movement of a ________ from an area of low concentration to an area of ______ concentration.

Solvent; high

Low; solute

High; low

Solvent; low

Solute; solvent

Solution; high

8. We add salt to water on the roads so that the freezing point increases.

True

False

We do it to decrease the freezing point so that the water does not freeze in cold temperatures.

Explanation

We do it to decrease the freezing point so that the water does not freeze in cold temperatures.

9. The units used for "change in boiling point" or "change in freezing point" must be in kelvin.

True

False

As it is "change" of temperature, we can use both kelvin and degrees.

Explanation

As it is "change" of temperature, we can use both kelvin and degrees.

10. Match the following

Molality

PPM

Molarity

Molar fraction

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