Supernatant - Correct Answer a liquid lying above a sediment (floating on the surface)
Tare - Correct Answer counterweight consisting of an empty container that is used as a counterbalance to obtain net weight
Filtrate - Correct Answer the product of filtration
Molecular Formula - Co...
Chemistry Lab Exam 1 Questions Answered Correctly
Supernatant - Correct Answer a liquid lying above a sediment (floating on the surface)
Tare - Correct Answer counterweight consisting of an empty container that is used as a counterbalance
to obtain net weight
Filtrate - Correct Answer the product of filtration
Molecular Formula - Correct Answer a chemical formula based on analysis and molecular weight
Empirical Formula - Correct Answer a chemical formula showing the ratio of elements in a compound
rather than the total number of atoms
Structural Formula - Correct Answer an expanded molecular formula showing the arrangement of
atoms within the molecule
Law of Constant Composition - Correct Answer all samples of a pure compound will contain the same
elements in the same mass proportions
Limiting Reagent - Correct Answer the reagent that "runs out" first will limit the amount of product that
is formed
Theoretical Yield - Correct Answer the calculated amount of final product that comes from to
stoichiometrically balanced reaction
Actual Yield - Correct Answer The actual amount of product at the end of the reaction
Percent Yield - Correct Answer to determine how efficient the reaction was; the actual yield expressed
as a percentage of the theoretical yield
= actual/theo x 100
, Percent Error - Correct Answer the difference between the actual and theoretical yields
= theo-actual/theo x 100
Physical States - Correct Answer either solid, liquid, gas or aqueous (dissolved in water)
Molar Coefficients - Correct Answer the numbers in front of the chemical formulas that are used to
balance the equation
Molar Ratios - Correct Answer the ratio of moles of the chemicals that are involved in the reaction
Why is it necessary to use the same balance throughout the experiment? - Correct Answer Because the
calibrations might be different for different balances
Physical Properties - Correct Answer can be determined without changing a substance into another
substance
Chemical Properties - Correct Answer are determined from the chemical reaction a substance
undergoes
Cation - Correct Answer the positive ion
Anion - Correct Answer the negative ion
Combination - Correct Answer A + B → AB
2 reactants → 1 product
Decomposition - Correct Answer AB → A + B
1 reactant -heat→ 2 or more products
Single Replacement - Correct Answer A + BC → B + AC
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