CHEM 121 LAB REPORTS 3 ACTUAL TEST SCRIPT 2026 COMPLETE QUESTIONS AND ANSWERS GRADED A+

CHEM 121 LAB REPORTS 3 ACTUAL TEST
SCRIPT 2026 COMPLETE QUESTIONS AND
ANSWERS GRADED A+

◉ Analytical balance, thermometer, and pipet. Answer: What 3
instruments were used in Experiment 1?


◉ 1). Calibrated a pipet
2). Measured the density of water
3). Measured the density of antifreeze. Answer: What did you
accomplish in Experiment 1?


◉ Insert the tip of the pipet into a liquid and squeeze the rubber
bulb to get the correct amount of liquid you want to measure, or you
can use your finger to get the liquid up. Answer: How do you use a
pipet?


◉ density= mass/volume. Answer: What is the formula for density?


◉ 1).Silicon dioxide
2).Sodium chloride
3).Calcium carbonate. Answer: What are 3 of the main components
of beach sand?

, ◉ Having the same composition throughout the mixture, often called
a solution
- Ex. vinegar and household amonia. Answer: What is a
homogeneous mixture?


◉ Having varying composition throughout the mixture
- Ex. Dirt with pebbles. Answer: What is a heterogeneous mixture?


◉ A physical property used to separate mixtures. Answer: What is
solubility?


◉ 1). Filtering
2). Solubility
3). Decantation
4). Sedimentation
5). Extraction
6). Sublimation. Answer: What are 6 methods of separating
mixtures?


◉ Recording mass of evaporating dish with and without beach sand,
add water, decant the solution to separate the components, repeat
with a new liquid, filter out the liquid using a filter paper. Answer:
What was the procedure and result of Experiment 2?