CHEM 121 LAB REPORT TRAINING STUDY
SHEET 2026 UPDATED QUESTIONS AND
ANSWERS
◉any result that is more then two standard deviations from the
mean should be discarded . Answers: What is the rule of thumb for
standard deviation?
◉gravimetric and volumetric analysis . Answers: What are the 2
common quantitative methods used in analytical chemistry?
◉Finding the mass and percent of phosphorus in the sample by
using filter paper . Answers: What was the procedure and result of
Experiment 3?
◉Added methanol to the zinc-iodide mixture, exothermic reaction
occurs, boil solution, and recover solid zinc . Answers: What was the
procedure and result of Experiment 4?
◉Experiment 4: Finding an Empirical Formula- The Synthesis of
Zinc Iodide from its Elements . Answers: What experiment is this the
objective for: Combine elemental zinc metal and elemental iodine, a
non-metal, to form the binary ionic compound zinc iodide
, ◉zinc . Answers: 3/4 is used in its elemental form as a coating to
protect iron and steel from corrosion
◉red dog mine . Answers: World's largest zinc mine located above
the Arctic Circle in Alaska
◉Iodine . Answers: shiny blue-black solid diatomic nonmetal
element; halogen; goes from a solid to vapor without becoming a
liquid; retrieved from underground brines
◉AX+BY ----> AY+BX . Answers: What is the general equation for a
metathesis reaction?
◉1). Formation of a precipitate
2). Formation of a weak or non electrolyte
3). Formation of a gas that escapes from solution . Answers: What
are the driving forces for a metathesis reaction to occur?
◉Mixing 15 drops of reagents in small test tubes, observe them to
see if they reacted or not, observed color, solubility, temperature,
and crystallization . Answers: What was the procedure and result
from Experiment 5?
SHEET 2026 UPDATED QUESTIONS AND
ANSWERS
◉any result that is more then two standard deviations from the
mean should be discarded . Answers: What is the rule of thumb for
standard deviation?
◉gravimetric and volumetric analysis . Answers: What are the 2
common quantitative methods used in analytical chemistry?
◉Finding the mass and percent of phosphorus in the sample by
using filter paper . Answers: What was the procedure and result of
Experiment 3?
◉Added methanol to the zinc-iodide mixture, exothermic reaction
occurs, boil solution, and recover solid zinc . Answers: What was the
procedure and result of Experiment 4?
◉Experiment 4: Finding an Empirical Formula- The Synthesis of
Zinc Iodide from its Elements . Answers: What experiment is this the
objective for: Combine elemental zinc metal and elemental iodine, a
non-metal, to form the binary ionic compound zinc iodide
, ◉zinc . Answers: 3/4 is used in its elemental form as a coating to
protect iron and steel from corrosion
◉red dog mine . Answers: World's largest zinc mine located above
the Arctic Circle in Alaska
◉Iodine . Answers: shiny blue-black solid diatomic nonmetal
element; halogen; goes from a solid to vapor without becoming a
liquid; retrieved from underground brines
◉AX+BY ----> AY+BX . Answers: What is the general equation for a
metathesis reaction?
◉1). Formation of a precipitate
2). Formation of a weak or non electrolyte
3). Formation of a gas that escapes from solution . Answers: What
are the driving forces for a metathesis reaction to occur?
◉Mixing 15 drops of reagents in small test tubes, observe them to
see if they reacted or not, observed color, solubility, temperature,
and crystallization . Answers: What was the procedure and result
from Experiment 5?
