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Chm 142 Exam questions and answers Graded A+ Which of the following species (31P3-, 32P2-, 40Ca2+, 32Ar) has the same number of electrons as 32S2-? Only 32P2- Only 31P3- and 32Ar Only 31P3-, 40Ca2+, and 32Ar Only 32P2- and 32Ar Only 40Ca2+ -Only 31P3-, 40Ca2+, and 32Ar Which of the following species (31P3-, 33P2-, 34S2-, 32Ar)has the same number

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6 pages

Written in 2025/2026

Grade A+

MedicAcademy

CHM 142 Exam questions and answers Graded A+ acetate -C₂H₃O₂- or CH₃COO⁻ carbonate -CO₃²⁻ phosphate -PO₄³⁻ perchlorate/perbromate/periodate -ClO₄⁻ / BrO₄⁻ / IO₄⁻ sulfate -SO₄²⁻ phosphite -PO₃³⁻

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2 pages

Written in 2025/2026

Grade A+

MedicAcademy

CHM 142 Exam2 questions and answers Graded A+ what direction will a reaction shift if a product is removed right what direction will a reaction shift if a product is added left what direction will a reaction shift if a reactant is removed left what direction will a reaction shift if a reactant is added right What's the Arrhenius definition of a base? a substance that produces OH- in

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6 pages

Written in 2025/2026

Grade A+

MedicAcademy

Chm 142 Exam3 questions and answers Graded A+ [HB] -Conjugate Acid [B] -Base [A] -Conjugate Base [HA] -Acid Q < Ksp -the solution is unsaturated and will dissolved more solid if available Q = Ksp -the solution is saturated and at equilibr

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2 pages

Written in 2025/2026

Grade A+

MedicAcademy

Chm 142 Exam3 questions and answers Graded A+ [HB] -Conjugate Acid [B] -Base [A] -Conjugate Base [HA] -Acid Q < Ksp -the solution is unsaturated and will dissolved more solid if available Q = Ksp -the solution is saturated and at equ

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2 pages

Written in 2025/2026

Grade A+

MedicAcademy

CHM 142 Exam4 questions and answers Graded A+ Electrons flow ______ one way in a redox reaction, from _____________ potential energy. spontaneously, high to low Electricity the movement of electric charge, carried by charge carriers (ions or electrons) oxidation occurs at the anode reduction occurs at the cathode Voltaic Cells use spontaneous oxidation-reduction reactions to convert chemical energy into

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9 pages

Written in 2025/2026

Grade A+

MedicAcademy

CHM 142 Exam2 questions and answers Graded A+ Which way does a reaction shift when you add a reactant? Add a product? Remove a reactant? Remove a product? - add reactant: shifts right/products - add product: shifts left/reactants - remove reactant: shifts left/reactants - remove product: shifts right/products What way does an endothermic reaction shift when you increase temperature? What about decrease? - increase: shifts right/products - decrease: shifts left/reactants What way does ...

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5 pages

Written in 2025/2026

Grade A+

MedicAcademy

Chm 142Exam questions and answers Graded A+ A liquid rises in a straw when you suck on the straw because a) the vacuum pulls the liquid up the straw. b) capillary forces attract the liquid to the walls of the straw. c) the air pressure inside the straw is less than the air pressure outside the straw. d) the air pressure inside the straw is greater than the air pressure outside the straw. e) the liquid level inside the straw is sucked when the liquid level outside the straw

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10 pages

Written in 2025/2026

Grade A+

MedicAcademy

CHM 142Exam questions and answers Graded A+ What happens if Q > K? -Shift left (toward reactants) What happens if Q < K? -Shift right (toward products) What does Q equal when the system is at equilibrium? -Q = K Increasing volume (gases) shifts toward... -Side with more moles of gas (Δn > 0) Decreasing volume shifts toward... -Side with fewer moles of gas (Δn < 0) What happens to Q when product is added? -Q increases

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4 pages

Written in 2025/2026

Grade A+

MedicAcademy

Chm 142Exam questions and answers Graded A+ Which of the following species (31P3-, 32P2-, 40Ca2+, 32Ar) has the same number of electrons as 32S2-? Only 32P2- Only 31P3- and 32Ar Only 31P3-, 40Ca2+, and 32Ar Only 32P2- and 32Ar Only 40Ca2+ -Only 31P3-, 40Ca2+, and 32Ar Which of the following species (31P3-, 33P2-, 34S2-, 32Ar)has the same number

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6 pages

Written in 2025/2026

Grade A+

MedicAcademy

CHM 142 Exam3 questions and answers Graded A+ Any "insoluble" ionic compound is actually __________ soluble in aqueous solution. -slightly _______ reach equilibrium with very little solute dissolved. -Insoluble ("slightly soluble") ionic compounds Equilibrium of a slightly soluble ionic compound exists between _______ solute and ______ ions. -solid, aqueous Ion-product expression -Qsp ________ ________ are not included in Qsp. -pure sol

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17 pages

Written in 2025/2026

Grade A+

MedicAcademy

CHM 142 Vocab Defs Exam questions and answers Graded A+ What are molarity and molality? -Molarity is moles of solute per liter of solution; molality is moles of solute per kilogram of solvent. What does enthalpy of solution (∆

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4 pages

Written in 2025/2026

Grade A+

MedicAcademy

CHM 142 Vocab Defs Exam questions and answers Graded A+ What are molarity and molality? -Molarity is moles of solute per liter of solution; molality is moles of solute per kilogram of solvent. What does enthalpy of solution (∆

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4 pages

Written in 2025/2026

Grade A+

MedicAcademy

CHM 142 Vocab Defs Exam questions and answers Graded A+ What are molarity and molality? -Molarity is moles of solute per liter of solution; molality is moles of solute per kilogram of solvent. What does enthalpy of solution (∆

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4 pages

Written in 2025/2026

Grade A+

MedicAcademy

CHM 142 Strong Acids/Bases Exam questions and answers Graded A+

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2 pages

Written in 2025/2026

Grade A+

MedicAcademy

CHM 142 questions and answers Graded A+ Conjugate Base -Remove H+ (proton) Conjugate Acid -Gain H+ (proton) What is an Arrhenius acid? -A substance that increases the concentration of H⁺ (or H₃O⁺) in water What is an Arrhenius base? -A substance that increases the concentration of OH⁻ in water What is a Brønsted-Lowry acid? -

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8 pages

Written in 2025/2026

Grade A

MedicAcademy

CHM 142 Final Exam questions and answers Graded A+ Definition of Bronsted-Lowry acid -donates protons Definition of Bronsted-Lowry base -accepts protons Bronsted-Lowry bases have -a lone pair of electrons to accept a H+ ion Definition of Arrhenius acid -forms H3O+ Definition of Arrhenius base -forms OH

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7 pages

Written in 2025/2026

Grade A+

MedicAcademy

CHM 142 Final Exam questions and answers Graded A+ Which particle, if lost from the nucleus, will not result in a change in the atomic number? -neutron An atom of the element of atomic number 84 and mass number 199 emits an alpha particle. The residual atom after this change has an atomic number of _______ and a mass number of __________. -82, 195 In effecting nuclear changes by bombarding target nuclei with positively charged alpha particles, it is necessary to accelerate these particle...

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24 pages

Written in 2025/2026

Grade A+

MedicAcademy

CHM 142 Exam2 questions and answers Graded A+ Add reactant will shift right/ make more product Remove product will shift right/make more product Add product will shift left/ make more reactant Remove reactant will shift left/ make more reactant If we half the volume... double the concentration of each gas If we double the volume... half the concentration of each gas

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4 pages

Written in 2025/2026

Grade A+

MedicAcademy

CHM 142 Exam questions and answers Graded A+ Molarity -M - moles solute/liters solution Molality -m - moles solute/kg solvent grams equals... -mL London dispersion forces (LDFs) -polarization of the molecule causing attractive forces btwn neighboring molecules; WEAK Dipole-dipole interactions -partially positive charged part of a POLAR molecule interacts with the partially negative charge of another POLAR molecule; MEDIUM

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3 pages

Written in 2025/2026

Grade A+

MedicAcademy