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37. What type of concept associated with dispersion forces is depicted below? Page 6 Electrostatic attraction...
37. What type of concept associated with dispersion forces is depicted below? Page 6 Electrostatic attraction Helium atom 1 Helium atom 2 8 (b) A) Capillary action B) Polarizability C) Molecularity D) Dynamic equilibrium E) Liquid crystal formation 38. What is the pH of a 0.20 M solution of NH3? Kb = 1.8 x 10' for NHz. A) 2.72 B) 11.28 C) 11.98 D) 7.00 39. What are the three structural factors that affect acid strength? A) Amount of oxygen...
36. When discussing energy changes in solutions, which of the following statements is TRUE? (AH change...
36. When discussing energy changes in solutions, which of the following statements is TRUE? (AH change in enthalpy, soln = solution) ΔΗ. = ΔΗ. + ΔΗ. + ΔΗ. 'soln 'solute 'solvent 'mix A) AH mix will always be an endothermic process B) AHsolute and AH solvent are sometimes exothermic processes C) Aholven makes no contribution to the overall AHoln D) AHolue and AHolvent will always be endothermic processes E) None of the statements are true 37. What type of concept...
36. When discussing energy changes in solutions, which of the following statements is TRUE? (AH =...
36. When discussing energy changes in solutions, which of the following statements is TRUE? (AH = change in enthalpy, soln = solution) AH = ΔΗ + ΔΗ + ΔΗ soln 'solute solvent mix A) AH mix will always be an endothermic process B) AHsolute and AHsolvent are sometimes exothermic processes C) Holvent makes no contribution to the overall AH,on D) AHsolute and AHsolvent will always be endothermic processes E) None of the statements are true 39. What are the three...
40. What is the pOH of a 0.045 M solution of calcium hydroxide, Ca(OH)2? A) 1.05...
40. What is the pOH of a 0.045 M solution of calcium hydroxide, Ca(OH)2? A) 1.05 B) 12.95 C) 12.65 D) 1.35 41. From Table 16.3, which of the following statements for Carbonic acid is true? See page 7 TABLE 16.3. Acid-Dissociation Constants of Some Common Polyprotic Acids Formula KI Ascorbic HỊCH, 80 X 10+ 16 X 10-12 Carbonic H.CO, 43 X 10 56 x 101 Citric HC,H,Op 74 X 10+ 1.7 X 100 4.0 X 10 Oxalic H.CO 5.9...
D Question 25 Calculate the pH of a 0.10 M CH3NH,Cl solution. Ky(CH NH) - 4.4x104...
D Question 25 Calculate the pH of a 0.10 M CH3NH,Cl solution. Ky(CH NH) - 4.4x104 5.82 943 Сосоо 4.36 8.18 Question 26 5 pts When a strong acid is added to a strong base in a titration, what is expected at the equivalence point? A acidic solution from the conjugate acid of the strong base A neutral solution with a pH - 7 A acidic solution from the strong acid A basic solution from the strong base A basic...
9. What is the pH for 0.20 M HCIO solution? K = 2.5 x 10-7 a)...
9. What is the pH for 0.20 M HCIO solution? K = 2.5 x 10-7 a) 4.05 b) 3.70 c) 4.80 d) 7.00 e) 7.40 10. What is the pH of a mixture containing 0.30 M HNO, and 0.15 M NaNO, (K, for HNO2 is 4.5 x 104) a) 4.35 b) 3.05 c) 4.65 d) 5.01 e) 4.05 11. Acid strength increases in the series: HCN <HF <HSO.. Which of these species is the strongest base? a) SO42- b) F-...
8. What is the pH of a 5.00 x 102 M Ba(OH)2(aq) solution at room temperature?...
8. What is the pH of a 5.00 x 102 M Ba(OH)2(aq) solution at room temperature? a. 1.00 b. 1.30 c. 12.02 d. 12.70 e. 13.00 9. Assuming equal concentrations of conjugate acid and base, which one of the following mixtures is suitable for making a buffer solution with an optimum pH of 4.6-4.8? a. CH3COONa/CH3COOH (K = 1.8 x 105) b. NH/NHACI (K = 5.6 x 10-1) c. NaOCI/HOCI (Ka = 3.2 x 108) d. NaNO2/HNO2 (Ka = 4.5...
37. What type of concept associated with dispersion forces is depicted below? Page 6 Electrostatic attraction Helium atom 1 Helium atom 2 8 (b) A) Capillary action B) Polarizability C) Molecularity D) Dynamic equilibrium E) Liquid crystal formation 38. What is the pH of a 0.20 M solution of NH3? Kb = 1.8 x 10' for NHz. A) 2.72 B) 11.28 C) 11.98 D) 7.00 39. What are the three structural factors that affect acid strength? A) Amount of oxygen...
36. When discussing energy changes in solutions, which of the following statements is TRUE? (AH change in enthalpy, soln = solution) ΔΗ. = ΔΗ. + ΔΗ. + ΔΗ. 'soln 'solute 'solvent 'mix A) AH mix will always be an endothermic process B) AHsolute and AH solvent are sometimes exothermic processes C) Aholven makes no contribution to the overall AHoln D) AHolue and AHolvent will always be endothermic processes E) None of the statements are true 37. What type of concept...
36. When discussing energy changes in solutions, which of the following statements is TRUE? (AH = change in enthalpy, soln = solution) AH = ΔΗ + ΔΗ + ΔΗ soln 'solute solvent mix A) AH mix will always be an endothermic process B) AHsolute and AHsolvent are sometimes exothermic processes C) Holvent makes no contribution to the overall AH,on D) AHsolute and AHsolvent will always be endothermic processes E) None of the statements are true 39. What are the three...
40. What is the pOH of a 0.045 M solution of calcium hydroxide, Ca(OH)2? A) 1.05 B) 12.95 C) 12.65 D) 1.35 41. From Table 16.3, which of the following statements for Carbonic acid is true? See page 7 TABLE 16.3. Acid-Dissociation Constants of Some Common Polyprotic Acids Formula KI Ascorbic HỊCH, 80 X 10+ 16 X 10-12 Carbonic H.CO, 43 X 10 56 x 101 Citric HC,H,Op 74 X 10+ 1.7 X 100 4.0 X 10 Oxalic H.CO 5.9...
D Question 25 Calculate the pH of a 0.10 M CH3NH,Cl solution. Ky(CH NH) - 4.4x104 5.82 943 Сосоо 4.36 8.18 Question 26 5 pts When a strong acid is added to a strong base in a titration, what is expected at the equivalence point? A acidic solution from the conjugate acid of the strong base A neutral solution with a pH - 7 A acidic solution from the strong acid A basic solution from the strong base A basic...
9. What is the pH for 0.20 M HCIO solution? K = 2.5 x 10-7 a) 4.05 b) 3.70 c) 4.80 d) 7.00 e) 7.40 10. What is the pH of a mixture containing 0.30 M HNO, and 0.15 M NaNO, (K, for HNO2 is 4.5 x 104) a) 4.35 b) 3.05 c) 4.65 d) 5.01 e) 4.05 11. Acid strength increases in the series: HCN <HF <HSO.. Which of these species is the strongest base? a) SO42- b) F-...
8. What is the pH of a 5.00 x 102 M Ba(OH)2(aq) solution at room temperature? a. 1.00 b. 1.30 c. 12.02 d. 12.70 e. 13.00 9. Assuming equal concentrations of conjugate acid and base, which one of the following mixtures is suitable for making a buffer solution with an optimum pH of 4.6-4.8? a. CH3COONa/CH3COOH (K = 1.8 x 105) b. NH/NHACI (K = 5.6 x 10-1) c. NaOCI/HOCI (Ka = 3.2 x 108) d. NaNO2/HNO2 (Ka = 4.5...
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