UCSB CHEM 6AL FINAL 2026
CHEMISTRY TEST PAPER
QUESTIONS ANSWERS GRADED A+
◉ Filtration.
Answer: the process that separates a solid from the liquid in a
heterogeneous mixture
◉ Sublimation.
Answer: A change directly from the solid to the gaseous state without
becoming liquid
◉ Evaporation.
Answer: Removing a liquid from a mixture by turning it into a gas.
◉ Solve for the mass of a chemical in a container.
Answer: [mass total] - [mass empty dish] = [mass of chemical]
◉ Fire diamond colors.
Answer: Blue (health risk), Red (flammability), Yellow (reactivity),
white (other comments; ie reacts with water).
◉ Hydrates.
Answer: Compounds that contain water molecules as part of their
crystaline structure (ex: MgSO₄ ⋅ 7H₂O)
, ◉ Lab three was called "hydration of an Epsom salt"... so what's
anEpsom salt?.
Answer: A magnesium sulfate hydrate which can exist in a number of
states ranging from [MgSO₄ ⋅ H₂O] to [MgSO₄ ⋅ 9H₂O]
◉ What was the objective of the third lab titled "hydration of an Epsom
salt".
Answer: To experimentally determine the number of water molecules
per formula unit of Epsom salt. We know Epsom salt is [MgSO₄ ⋅
XH₂O] and we're solving for X.
◉ Limiting reagent.
Answer: any reactant that is used up first in a chemical reaction; it
determines the amount of product that can be formed in the reaction
◉ Theoretical yield.
Answer: the maximum amount of product that can be produced from a
given amount of reactant
◉ Actual Yield.
Answer: the measured amount of a product obtained from a reaction
◉ How do you calculate percent yield?.
Answer: AY/TY x100%
CHEMISTRY TEST PAPER
QUESTIONS ANSWERS GRADED A+
◉ Filtration.
Answer: the process that separates a solid from the liquid in a
heterogeneous mixture
◉ Sublimation.
Answer: A change directly from the solid to the gaseous state without
becoming liquid
◉ Evaporation.
Answer: Removing a liquid from a mixture by turning it into a gas.
◉ Solve for the mass of a chemical in a container.
Answer: [mass total] - [mass empty dish] = [mass of chemical]
◉ Fire diamond colors.
Answer: Blue (health risk), Red (flammability), Yellow (reactivity),
white (other comments; ie reacts with water).
◉ Hydrates.
Answer: Compounds that contain water molecules as part of their
crystaline structure (ex: MgSO₄ ⋅ 7H₂O)
, ◉ Lab three was called "hydration of an Epsom salt"... so what's
anEpsom salt?.
Answer: A magnesium sulfate hydrate which can exist in a number of
states ranging from [MgSO₄ ⋅ H₂O] to [MgSO₄ ⋅ 9H₂O]
◉ What was the objective of the third lab titled "hydration of an Epsom
salt".
Answer: To experimentally determine the number of water molecules
per formula unit of Epsom salt. We know Epsom salt is [MgSO₄ ⋅
XH₂O] and we're solving for X.
◉ Limiting reagent.
Answer: any reactant that is used up first in a chemical reaction; it
determines the amount of product that can be formed in the reaction
◉ Theoretical yield.
Answer: the maximum amount of product that can be produced from a
given amount of reactant
◉ Actual Yield.
Answer: the measured amount of a product obtained from a reaction
◉ How do you calculate percent yield?.
Answer: AY/TY x100%
