Chem 202

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Examen

Chem 202 Exam 1 with Questions and Answers
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noviembre 2024

2024/2025

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Chem 202 Exam 1 with Questions and Answers Which of the following factors affect the solubility of a gas in a liquid solvent? 1. Pressure 2. Temperature 3. Identity of Gas A. 1 only B. 1 and 2 C. 2 only D. 1, 2, and 3 E. 3 only ANSWER D. 1, 2, and 3 The solubility of a salt in H2O is 10g/L at 25 C. If you put 11 g of this salt in 1 L H2O at 25 C, the solution is: A. Saturated B. Unsaturated C. Supersaturated D. All of the above ANSWER A. Saturated Which of the followin...
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Examen

Chem 202 Exam 2 with Questions and Answers
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9

noviembre 2024

2024/2025

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Chem 202 Exam 2 with Questions and Answers which substances exhibit only london (dispersion) forces? ANSWER Cl2 and He if a solid line represents a covalent bond and a dotted line represents intermolecular attraction, which of the choices shows a hydrogen bond? ANSWER H3N⋅⋅⋅⋅⋅⋅H−O−H Arrange the molecules from strongest london (dispersion) force to weakest ANSWER 1.CH3CH2CH2CH2CH2CH2CH3 2.CH3CH2CH2CH2CH3 3.CH3C(CH3)2CH3 Hydrogen bonding, dipole-dipole, and disper...
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Chem 202 Exam 1 Prep with Questions and Answers
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8

noviembre 2024

2024/2025

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Chem 202 Exam 1 Prep with Questions and Answers For a given compound, its liquid phase has less entropy than its solid phase. ANSWER False. Entropy is Gas > Liquid > Solid. Of the three common phases, intermolecular forces are the strongest in the solid phase. ANSWER True. Intermolecular forces are Gas < Liquid < Solid. An ideal gas has no intermolecular forces. ANSWER True. Deposition is favored by entropy. ANSWER False. Sublimation is favored by entropy. Ice cubes le...
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Examen

Chem 202 Quiz with Complete Solutions
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5

noviembre 2024

2024/2025

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Chem 202 Quiz with Complete Solutions In order to remove highly charged compounds from an ion exchange column, the elution solution should be high or low ionic strength? ANSWER High ionic strength What would happen if the highest ionic strength elution solution is used first? Correct! ANSWER All the charged compounds come off the column Using UV-Vis Spectroscopy, you will quantify the complex ions that you purified earlier in the lab. The Beer-Lambert Law states that the intensity of ...
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Chem 202 Final Exam Study Guide with Questions and Answers
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5

noviembre 2024

2024/2025

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Chem 202 Final Exam Study Guide with Questions and Answers Solubility (g/L) ANSWER The maximum amount of solute that will dissolve in a given quantity of solvent at a specific temperature Molar Solubility (mol/L) (s) ANSWER The number of moles dissolved in 1 L of a saturated solution (in mol/L) Solubility Product (Ksp) ANSWER Equilibrium constant representing the "product of solubility" Precipitation Reactions ANSWER Use Q vs. Ksp to predict whether a precipitate will form: ...
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Chem 202 Chapter 14 Exam with Questions and Answers
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4

noviembre 2024

2024/2025

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Chem 202 Chapter 14 Exam with Questions and Answers What is the acidic equilibrium eq ANSWER HA + H2O = A- + H3O+ What is the basic equilibrium eq ANSWER A- + H2O = OH- + HA Write the acidic equilibrium eq for CH3NH3+ ANSWER CH3NH3+ = H+ + CH3NH2 Write the basic equilibrium equation for C₆H₅NH₂ ANSWER C₆H₅NH₂(aq) + H₂O(l) ⇌ OH⁻(aq) + C₆H₅NH₃⁺(aq) Write the formula of the conjugate acid of CH₃CH₂O⁻ ANSWER CH3CH2OH Write the formula of the conjugat...
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Examen

CHEM 202 NCSU Lab Final Study Guide with Questions and Answers
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4

noviembre 2024

2024/2025

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CHEM 202 NCSU Lab Final Study Guide with Questions and Answers What formula is used to determine the mmol of acid and base in the reaction table? ANSWER Volume in mL x concentration in mmol/mL = mmol Please describe the rules for handling significant figures for Lab 1, Data Table A. ANSWER For data table A, the mmol of material are entered to 2 significant figures because the volume has 2 sig figs, multiplied by the concentration of 2 sig figs. The temperature different is entered to the ...
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Examen

CHEM 202 Test with Questions and Answers
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3

noviembre 2024

2024/2025

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CHEM 202 Test with Questions and Answers sublimation ANSWER solid to gas fusion ANSWER solid to liquid freezing ANSWER liquid to solid vaporization ANSWER Liquid to gas condensation ANSWER Gas to liquid Deposition ANSWER gas to solid Low delta Hvap ANSWER weak IF High delta Hvap ANSWER strong IF low EVP ANSWER strong IF high EVP ANSWER weak IF low boiling point ANSWER weak IF high boiling point ANSWER strong IF
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Chem 202 Exam 1 Packet 1 with Questions and Answers
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4

noviembre 2024

2024/2025

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Chem 202 Exam 1 Packet 1 with Questions and Answers in a lewis structure, what can H have? ANSWER 1 bond, 0 pairs in a lewis structure, what can C have? ANSWER 4 bonds, 0 pairs in a lewis structure, what can N have? ANSWER 3 bonds, 1 pair in a lewis structure, what can O have? ANSWER 2 bonds, 2 pairs in a lewis structure, what can F, Cl, Br, and I have? ANSWER 1 bond, 3 pairs what is the 1st exception of the octet rule? ANSWER species having an odd number of electrons what i...
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