Chemistry 1212 Lab LSU Study Guide
Exam with Actual Detailed Answers.
solubility - Answer The ability of a solid or gas to dissolve in a liquid
solvent - Answer The solution that does the dissolving is the
solute - Answer The substance being dissolved is the
immiscible - Answer If two liquids do not mix completely, they will form layers
miscible - Answer When two liquids mix completely with each other
density - Answer mass to volume ratio (mass(g)/volume(mL)
lesser - Answer The layer with the ________ density will float or rise to the top of the denser
layer.
weight by difference technique - Answer This technique involves determining and recording
the mass of an empty container, then determining and recording the mass of the container +
chemical. The difference between the two masses is the mass of the chemical.
tare feature - Answer This recalibrates the balance to read zero with the weight of the empty
container currently on the balance.
meniscus - Answer you must be at eye level with the ________.
physical property - Answer Properties that do not change the chemical nature of matter
chemical property - Answer Properties that do change the chemical nature of matter
chemical property - Answer solubility
, chemical property - Answer ability to dissolve metals
chemical property - Answer ability to react with oxygen
physical property - Answer boiling point
physical property - Answer color of liquid
chemical property - Answer ability to dissolve in water
Layers would form in the beaker. Top layer would be the least dense (olive oil), the water would
be the bottom layer because it is the most dense, and the ice cube would float inside of the
olive oil layer. - Answer What would happen if you mix water, olive oil, and an ice cube in a
beaker?
insoluble - Answer Al2O3 sinks to the bottom of a tall column filled with water
insoluble - Answer Sand settles to the bottom of a pond.
miscible - Answer Water and acetone mix completely
soluble - Answer salt completely disappears when added to boiling water.
insoluble - Answer MgSO4 remains a solid when mixed with hexane (ℓ).
Since density=mass/volume, the calculated density would be higher because you are dividing
using a larger mass. - Answer How would the value of density for water be affected if the mass
of water was recorded as 5.71g instead of 5.17g for a volume of 5.22mL? Explain.
Water would sink to the bottom, the olive oil will be in the middle, and the alcohol will float on
top. - Answer Rubbing alcohol is miscible with water and has a density of 0.785g/mL. Olive oil
is immiscible with alcohol and has a density of 0.92g/mL. What will happen when water is
added to the beaker, then olive oil, and then rubbing alcohol?
Exam with Actual Detailed Answers.
solubility - Answer The ability of a solid or gas to dissolve in a liquid
solvent - Answer The solution that does the dissolving is the
solute - Answer The substance being dissolved is the
immiscible - Answer If two liquids do not mix completely, they will form layers
miscible - Answer When two liquids mix completely with each other
density - Answer mass to volume ratio (mass(g)/volume(mL)
lesser - Answer The layer with the ________ density will float or rise to the top of the denser
layer.
weight by difference technique - Answer This technique involves determining and recording
the mass of an empty container, then determining and recording the mass of the container +
chemical. The difference between the two masses is the mass of the chemical.
tare feature - Answer This recalibrates the balance to read zero with the weight of the empty
container currently on the balance.
meniscus - Answer you must be at eye level with the ________.
physical property - Answer Properties that do not change the chemical nature of matter
chemical property - Answer Properties that do change the chemical nature of matter
chemical property - Answer solubility
, chemical property - Answer ability to dissolve metals
chemical property - Answer ability to react with oxygen
physical property - Answer boiling point
physical property - Answer color of liquid
chemical property - Answer ability to dissolve in water
Layers would form in the beaker. Top layer would be the least dense (olive oil), the water would
be the bottom layer because it is the most dense, and the ice cube would float inside of the
olive oil layer. - Answer What would happen if you mix water, olive oil, and an ice cube in a
beaker?
insoluble - Answer Al2O3 sinks to the bottom of a tall column filled with water
insoluble - Answer Sand settles to the bottom of a pond.
miscible - Answer Water and acetone mix completely
soluble - Answer salt completely disappears when added to boiling water.
insoluble - Answer MgSO4 remains a solid when mixed with hexane (ℓ).
Since density=mass/volume, the calculated density would be higher because you are dividing
using a larger mass. - Answer How would the value of density for water be affected if the mass
of water was recorded as 5.71g instead of 5.17g for a volume of 5.22mL? Explain.
Water would sink to the bottom, the olive oil will be in the middle, and the alcohol will float on
top. - Answer Rubbing alcohol is miscible with water and has a density of 0.785g/mL. Olive oil
is immiscible with alcohol and has a density of 0.92g/mL. What will happen when water is
added to the beaker, then olive oil, and then rubbing alcohol?
