Chem 106 Lab With Correct Answers 2024/25
Chromatography - Correct Answer a separation technique to separate components of
a mixture (like the dyes in M&Ms) based on how they interact with the fibers of paper
stationary phase - Correct Answer The paper
mobile phase - Correct Answer The solvent used to dissolve and carry the dyes is the
called the
Substances that interact strongly with the paper will move the - Correct Answer
shortest distance
Substances that interact weakly with the paper will move - Correct Answer furthest
distance
Distillation - Correct Answer a separation technique to separate components of a
mixture (like salt water) based on the volatility of the substances
The substance that is more volatile has a - Correct Answer lower boiling point. That
substance will boil (evaporate) before the other substance. It can then be cooled and
condensed and collected and in the process the two substances are separated.
Water is more volatile than - Correct Answer sodium chloride (salt) because it has a
lower boiling point. Water boils and evaporates while the salt remains in the solution.
The evaporated water is cooled and condensed back to liquid form and collected.
Silver nitrate, AgNO3 can be used to test the purity of the - Correct Answer "distilled"
water
Ag+ ions react with Cl- ions to produce a - Correct Answer white solid, AgCl. If the
distillation is successful there should not be any Cl- ions present and nothing should
happen when AgNO3 is added.
When ionic compounds are mixed, if all anion and cation combinations are soluble -
Correct Answer nothing happens (no precipitate forms)
If an anion and cation combination is insoluble a - Correct Answer precipitate (solid)
will form.
polyatomic ions -nitrate, phosphate, etc. - Correct Answer NO3- PO4-3
Most kidney stones are - Correct Answer calcium oxalate, which has a very low
solubility in water
Be able to do a % yield calculation for kidney stone synthesis given sample data -
Correct Answer = (actual yield/theoretical yield) X 100%
Chromatography - Correct Answer a separation technique to separate components of
a mixture (like the dyes in M&Ms) based on how they interact with the fibers of paper
stationary phase - Correct Answer The paper
mobile phase - Correct Answer The solvent used to dissolve and carry the dyes is the
called the
Substances that interact strongly with the paper will move the - Correct Answer
shortest distance
Substances that interact weakly with the paper will move - Correct Answer furthest
distance
Distillation - Correct Answer a separation technique to separate components of a
mixture (like salt water) based on the volatility of the substances
The substance that is more volatile has a - Correct Answer lower boiling point. That
substance will boil (evaporate) before the other substance. It can then be cooled and
condensed and collected and in the process the two substances are separated.
Water is more volatile than - Correct Answer sodium chloride (salt) because it has a
lower boiling point. Water boils and evaporates while the salt remains in the solution.
The evaporated water is cooled and condensed back to liquid form and collected.
Silver nitrate, AgNO3 can be used to test the purity of the - Correct Answer "distilled"
water
Ag+ ions react with Cl- ions to produce a - Correct Answer white solid, AgCl. If the
distillation is successful there should not be any Cl- ions present and nothing should
happen when AgNO3 is added.
When ionic compounds are mixed, if all anion and cation combinations are soluble -
Correct Answer nothing happens (no precipitate forms)
If an anion and cation combination is insoluble a - Correct Answer precipitate (solid)
will form.
polyatomic ions -nitrate, phosphate, etc. - Correct Answer NO3- PO4-3
Most kidney stones are - Correct Answer calcium oxalate, which has a very low
solubility in water
Be able to do a % yield calculation for kidney stone synthesis given sample data -
Correct Answer = (actual yield/theoretical yield) X 100%
