CHEM 162 EXPERIMENT LAB 1 EXAM SCRIPT
2026 TEST PAPER QUESTIONS AND
SOLUTIONS GRADED A+
◉ rate of dissolving vs temperature. Answer: temperature also
increases the rate of dissolving
◉ mass percent composition. Answer: (mass of element/ mass of
sample) x 100%
◉ percent composition. Answer: (mass of X/ mass of compound) x
100%
◉ theoretical yield. Answer: the maximum amount that can be
produced from a given amount of the limiting reactant
(the actual yield is always *less* than the theoretical yield)
◉ state /motion /spacing / shape / volume /compression
solid
liquid
,gas. Answer: SOLIDS vibrate / very close / fixed / fixed / no
compression
LIQUIDS free to move relative (hold hands) / close / takes shape /
fixed / no compression
GASES free to move / far apart / no fixed / no volume / yes
compressible
◉ In a laboratory, the following should NOT be worn
a. loose clothing
b. dangling jewelry
c. sandals
d. all of the above. Answer: d. all of the above
◉ What should be done if a chemical gets in the eye?
a. notify the instructor; then use the eye-wash fountain
b. use the eye-wash fountain; then return to the experiment
c. use the eye-wash fountain; then notify the instructor
d. nothing, unless the chemical causes discomfort. Answer: a. notify
the instructor; then use the eye-wash fountain
, ◉ Approved eye protection devices (such as goggles) are worn in the
laboratory
a. to avoid eye-stain
b. any time chemicals, heat or glassware are used
c. only if you don't have corrective glasses
d. to improve your eye vision. Answer: b. any time chemicals, heat or
glassware are used
◉ Eating and drinking is not permitted in the lab because:
a. there would not be enough time to finish the experiment
b. the storeroom serves terrible appetizers
c. you could be poisoned
d. the lab would become quite messy with this type of activity.
Answer: c. you could be poisoned
◉ When is the laboratory report due?
a. immediately after the completion of the experiment
b. at the beginning of the lab period one week after the completing
the experiment
c. at the end of the lab period one week after completing the
experiment
d. any time before the end of the semester. Answer: b. at the
beginning of the lab period one week after the completing the
experiment
2026 TEST PAPER QUESTIONS AND
SOLUTIONS GRADED A+
◉ rate of dissolving vs temperature. Answer: temperature also
increases the rate of dissolving
◉ mass percent composition. Answer: (mass of element/ mass of
sample) x 100%
◉ percent composition. Answer: (mass of X/ mass of compound) x
100%
◉ theoretical yield. Answer: the maximum amount that can be
produced from a given amount of the limiting reactant
(the actual yield is always *less* than the theoretical yield)
◉ state /motion /spacing / shape / volume /compression
solid
liquid
,gas. Answer: SOLIDS vibrate / very close / fixed / fixed / no
compression
LIQUIDS free to move relative (hold hands) / close / takes shape /
fixed / no compression
GASES free to move / far apart / no fixed / no volume / yes
compressible
◉ In a laboratory, the following should NOT be worn
a. loose clothing
b. dangling jewelry
c. sandals
d. all of the above. Answer: d. all of the above
◉ What should be done if a chemical gets in the eye?
a. notify the instructor; then use the eye-wash fountain
b. use the eye-wash fountain; then return to the experiment
c. use the eye-wash fountain; then notify the instructor
d. nothing, unless the chemical causes discomfort. Answer: a. notify
the instructor; then use the eye-wash fountain
, ◉ Approved eye protection devices (such as goggles) are worn in the
laboratory
a. to avoid eye-stain
b. any time chemicals, heat or glassware are used
c. only if you don't have corrective glasses
d. to improve your eye vision. Answer: b. any time chemicals, heat or
glassware are used
◉ Eating and drinking is not permitted in the lab because:
a. there would not be enough time to finish the experiment
b. the storeroom serves terrible appetizers
c. you could be poisoned
d. the lab would become quite messy with this type of activity.
Answer: c. you could be poisoned
◉ When is the laboratory report due?
a. immediately after the completion of the experiment
b. at the beginning of the lab period one week after the completing
the experiment
c. at the end of the lab period one week after completing the
experiment
d. any time before the end of the semester. Answer: b. at the
beginning of the lab period one week after the completing the
experiment
