Acid Base Review Answer Key | Felician University

University:
Felician University
Course:
CHEM-105 | Principles of Chemistry
Academic year:

2023
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319

Pages:

2
Author:

StellarStrategist

Acids and Bases Review Answer Key Molarity 1. What is the concentration of a solution with 2.3 moles of solute in 1,350 mL of solvent? Concentration = molarity = M = mol/L M = 2.3 mol / 1.35 L = 1.7 M 2. What is the molarity of a solution of 10.5 g of NaOH in 2.45 L of water? 10.5 g NaOH * (1 mol NaOH / 39.997 g NaOH) / 2.45 L = 0.107 M NaOH pH and pOH calculations 3. The pH of a solution is 3. What is the pOH? 14 - 3 = 11 4. The pOH of a solution is 4.5, what is the pH? 14 - 4.5 = 9.5 5. If the concentration of hydrogen ion is 4.5 x 10^(-4), what is the pH? pH = -log[H+] = -log(4.5 x 10^(-4)) = 3.35 6. If the concentration of hydrogen ion is 1.3 x 10^(-7), what is the pH? pH = -log(1.3 x 10^(-7)) = 6.89 7. If the concentration of hydroxide ion is 2.3 x 10^(-11), what is the pH of the solution? pOH = -log[OH-] = -log(2.3 x 10^(-11)) = 10.64 pH = 14 - 10.64 = 3.36 8. If the concentration of hydroxide ion is 4.7 x 10^(-4), what is the pOH of the solution? pOH = -log(4.7 x 10^(-4)) = 3.33 9. If pH is 4.5, what is the concentration of [H+]? [H+] = 10^(-pH) = 3.2 x 10^(-5) M 10. If pOH is 4.5, what is the concentration of [OH-]? [OH-] = 10^(-pOH) = 3.2 x 10^(-5) M General acids and bases 11. A strong acid and a strong base always produce what two things? water and a salt 12. HCl + CH₃COO⁻ → CH₃COOH + Cl⁻ Is the acid Arrhenius, Brønsted-Lowry, or both? does not produce H₃O⁺ 13. What is the conjugate acid? CH₃COOH 14. HNO₃ + KOH → H₂O + KNO₃ Is the acid Arrhenius, Brønsted-Lowry, or both? does not produce H₃O⁺ 15. What is the conjugate base? H₂O Equivalence point 16. For each situation, identify if the equivalence point is neutral, acidic or basic/alkaline. a. Strong acid/strong base: neutral b. Weak acid/strong base: basic c. Weak base/strong acid: acidic