CHEM 162 EXPERIMENT LAB 1 FINAL PAPER
2026 TESTED QUESTIONS WITH FULL
SOLUTION GRADED A+
◉ Burette. Answer: Glassware that measures volume in milliliters
(mL), numbers are in the opposite direction (0 at the top, 100 at the
bottom), used for titration, read to the hundredths place.
◉ Erlenmeyer Flask. Answer: Glassware that is usually used for
titration collection due to its lack of spilling.
◉ Volumetric Flask. Answer: Glassware that is calibrated to a
specific volume, usually used for dilutions.
◉ Volumetric Pipette. Answer: Glassware that allows for precise
measurements of volume (up to 4 sig figs), used with a large bulb.
◉ 10% Rule. Answer: Determines how accurately we can read an
instrument, The uncertainty in the instrument is 10% of the
smallest divisions.
e.g. Since 10% of 0.2 is 0.02, we should read this instrument to the
nearest 0.02 mL and report our answer as ± 0.02 mL.
, ◉ Density. Answer: The amount of matter in a substance.
◉ Percent Error. Answer: Determines the precision of calculations
performed in the experiment.
◉ Chromatography Paper. Answer: A separation method which
exploits molecular structure . Some molecules will be more attracted
to the surface than others and therefor capillaries of the paper will
push pigments upwards.
◉ Filtration. Answer: A separation method that exploits phase state
or particle size. Often used to separate a solution of solids from
liquids.
e.g. salt and sand mixture
◉ Distillation. Answer: A separation method that exploits
differences in boiling point. When a mixture is heated, the lower
boiling substance will boil off (become a vapor) first leaving behind
the higher boiling substance(s). The vapor must be recondensed and
allowed to collect in a separate container.
e.g. water, copper (II) sulfate and dirtB
◉ Magnetism. Answer: A separation method in which components
of a mixture may be separated by using a magnet if one of the
substances is attracted to the magnet and the other is not.
2026 TESTED QUESTIONS WITH FULL
SOLUTION GRADED A+
◉ Burette. Answer: Glassware that measures volume in milliliters
(mL), numbers are in the opposite direction (0 at the top, 100 at the
bottom), used for titration, read to the hundredths place.
◉ Erlenmeyer Flask. Answer: Glassware that is usually used for
titration collection due to its lack of spilling.
◉ Volumetric Flask. Answer: Glassware that is calibrated to a
specific volume, usually used for dilutions.
◉ Volumetric Pipette. Answer: Glassware that allows for precise
measurements of volume (up to 4 sig figs), used with a large bulb.
◉ 10% Rule. Answer: Determines how accurately we can read an
instrument, The uncertainty in the instrument is 10% of the
smallest divisions.
e.g. Since 10% of 0.2 is 0.02, we should read this instrument to the
nearest 0.02 mL and report our answer as ± 0.02 mL.
, ◉ Density. Answer: The amount of matter in a substance.
◉ Percent Error. Answer: Determines the precision of calculations
performed in the experiment.
◉ Chromatography Paper. Answer: A separation method which
exploits molecular structure . Some molecules will be more attracted
to the surface than others and therefor capillaries of the paper will
push pigments upwards.
◉ Filtration. Answer: A separation method that exploits phase state
or particle size. Often used to separate a solution of solids from
liquids.
e.g. salt and sand mixture
◉ Distillation. Answer: A separation method that exploits
differences in boiling point. When a mixture is heated, the lower
boiling substance will boil off (become a vapor) first leaving behind
the higher boiling substance(s). The vapor must be recondensed and
allowed to collect in a separate container.
e.g. water, copper (II) sulfate and dirtB
◉ Magnetism. Answer: A separation method in which components
of a mixture may be separated by using a magnet if one of the
substances is attracted to the magnet and the other is not.
