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# Separation of Mixtures (Grades 11-12)

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## Separation of Mixtures

1.
Which of the following can be separated by physical means?
1. carbon dioxide
2. seawater
3. ammonia
4. gold
2.
Which of the following properties is involved in the separation of a mixture using a filter?
1. size
2. boiling point
3. conductivity
4. first ionization energy
3.
Which of the following can be separated from water by physical means?
1. barium chloride
2. ammonium chloride
4. sodium nitrate
4.
Which of the following can be separated, based on the property of boiling point?
1. saltwater
2. an ink mixture
3. sand and salt
4. natural gas
5.
Which of the following properties is involved in separating an ink mixture?
1. Distillation
2. Evaporation
3. Chromatography
4. None of the above
6.
Which of the following equations represents the $R_{f}$ value?
1. $R_f="distance traveled by spot"/"distance traveled by solvent"$
2. $R_f="distance traveled by solvent"/"distance traveled by solution"$
3. $R_f="distance traveled by solvent"/"distance traveled by solute"$
4. $R_f="distance traveled by solution"/"distance traveled by solvent"$
7.
A spot travels 13 cm, while the solvent travels 15 cm. What is the $R_f$ value?
1. $R_f=1.15$
2. $R_f=0.87$
3. $R_f=1.00$
4. None of the above
8.
A spot travels 12 cm, while a solvent travels 20 cm. What is the value of $R_f$?
1. $R_f=0.6$
2. $R_f=1.67$
3. $R_f=0.03$
4. None of the above
9.
Summarize what will happen to two substances with different boiling points during distillation.

10.
Identify and summarize what type of mixture can be separated by filtration.

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