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Chem 120 Lab Final 2025/2026 Exam
Questions and Answers 100%
Guaranteed Success | Already Rated A+
What is NEVER a substitute for proper eye protection? (Goggles) - 🧠 ANSWER
✔✔Glasses/Contact lenses
Name 4 experiment evidences that are indicative of a chemical reaction. - 🧠
ANSWER ✔✔-color change
-precipitate formation
- temperature change
-gas formation
Name the 2 compounds that are necessary for reaction in an Alka-Seltzer cold
tablet. - 🧠 ANSWER ✔✔sodium bicarbonate/citric acid and water. (NaHCO3 +
H2O)
Is carbon monoxide produced in the alka-seltzer reaction? - 🧠 ANSWER ✔✔NO.
Name an inorganic acid - 🧠 ANSWER ✔✔1 example is HCI
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COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
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Name an inorganic base - 🧠 ANSWER ✔✔NaOH
What is an example of an acid-base indicator? - 🧠 ANSWER ✔✔litmus paper test
Which has a higher density, Hg 13.6 g/cm^3,
or Pt 2.5 * 10^-2 mg/ml? - 🧠 ANSWER ✔✔Hg
Why does Hg 13.6 g/cm^3 have a higher density than Pt 2.5 * 10^-2 mg/ml? - 🧠
ANSWER ✔✔Because 1 mL=1cm^3; using conversion factors one can find that
3600mg/ml > 2.25*10^-2 mg/ml
Where is the liquid waste container located? - 🧠 ANSWER ✔✔front of the lab
As you move from top to bottom on the periodic table, what happens to the first
ionization energy of an element? - 🧠 ANSWER ✔✔Ionization energy trends
increase going to the right and to the top of the periodic table. Thus going down a
group, the energy gets smaller. This is because the contents of elements grow less
compact as they get larger, and the attraction goes down.
T/F: students are allowed to wear "defective pants" in lab. - 🧠 ANSWER
✔✔FALSE: no defective pants are allowed in lab.
What material are the bottles on the lab desks, for example 6 M ammonium
hydroxide, made of? - 🧠 ANSWER ✔✔plastic
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COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
Chem 120 Lab Final 2025/2026 Exam
Questions and Answers 100%
Guaranteed Success | Already Rated A+
What is NEVER a substitute for proper eye protection? (Goggles) - 🧠 ANSWER
✔✔Glasses/Contact lenses
Name 4 experiment evidences that are indicative of a chemical reaction. - 🧠
ANSWER ✔✔-color change
-precipitate formation
- temperature change
-gas formation
Name the 2 compounds that are necessary for reaction in an Alka-Seltzer cold
tablet. - 🧠 ANSWER ✔✔sodium bicarbonate/citric acid and water. (NaHCO3 +
H2O)
Is carbon monoxide produced in the alka-seltzer reaction? - 🧠 ANSWER ✔✔NO.
Name an inorganic acid - 🧠 ANSWER ✔✔1 example is HCI
1
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
, 2
Name an inorganic base - 🧠 ANSWER ✔✔NaOH
What is an example of an acid-base indicator? - 🧠 ANSWER ✔✔litmus paper test
Which has a higher density, Hg 13.6 g/cm^3,
or Pt 2.5 * 10^-2 mg/ml? - 🧠 ANSWER ✔✔Hg
Why does Hg 13.6 g/cm^3 have a higher density than Pt 2.5 * 10^-2 mg/ml? - 🧠
ANSWER ✔✔Because 1 mL=1cm^3; using conversion factors one can find that
3600mg/ml > 2.25*10^-2 mg/ml
Where is the liquid waste container located? - 🧠 ANSWER ✔✔front of the lab
As you move from top to bottom on the periodic table, what happens to the first
ionization energy of an element? - 🧠 ANSWER ✔✔Ionization energy trends
increase going to the right and to the top of the periodic table. Thus going down a
group, the energy gets smaller. This is because the contents of elements grow less
compact as they get larger, and the attraction goes down.
T/F: students are allowed to wear "defective pants" in lab. - 🧠 ANSWER
✔✔FALSE: no defective pants are allowed in lab.
What material are the bottles on the lab desks, for example 6 M ammonium
hydroxide, made of? - 🧠 ANSWER ✔✔plastic
2
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
