The following plot shows a titration curve for the titration of 1.00 L of 1.00 M diprotic acid HS1U1B12S1U1B0A with NaOH. -Which point a-d represents the HX-/X2- buffer region?

A) point a B) point b C) point c D) point d A) point a B) point b C) point c D) point d

The following plot shows a titration curve for the titration of 1.00 L of 1.00 M diprotic acid HS1U1B12S1U1B0A with NaOH. -Which point a-d represents the first equivalence point?

A) point a B) point b C) point c D) point d A) point a B) point b C) point c D) point d

The following pictures represent solutions of CuS,which may also contain ions other than CuS1U1P12+S1S1P0 and SS1U1P12-S1S1P0 which are not shown.Gray spheres represent CuS1U1P12+S1S1P0 ions and dotted spheres represent SS1U1P12-S1S1P0 ions. -If solution (1)is a saturated solution of CuS,which of solutions (2)-(4)are supersaturated?

A) (2) B) (3) C) (4) D) None of these A) (2) B) (3) C) (4) D) None of these

The following pictures represent solutions at various stages in the titration of a weak diprotic acid HS1U1B12S1U1B0A with aqueous KOH.Unshaded spheres represent H atoms,black spheres represent oxygen atoms,and shaded spheres represent AS1U1P12-S1S1P0 ions.(KS1U1P1+S1S1P0,HS1U1B13S1U1B0OS1U1P1+S1S1P0 initially present,OHS1U1P1-S1S1P0 initially present and solvent water molecules have been omitted for clarity). -Which picture represents the system with the highest pH?

A) (1) B) (2) C) (3) D) (4) A) (1) B) (2) C) (3) D) (4)

What is the molar solubility of AgCl in 0.20 M NH3? Ksp for AgCl is 1.8 × 10-10 and Kf for Ag(NH3)2+ is 1.7 × 107.

A) 1)3 × 10-5 M B) 1)0 × 10- 2 M C) 1)1 × 10- 2 M D) 5)5 × 10-2 M A) 1)3 × 10-5 M B) 1)0 × 10- 2 M C) 1)1 × 10- 2 M D) 5)5 × 10-2 M

The following pictures represent solutions at various points in the titration of a weak acid HA with aqueous KOH.Unshaded spheres represent H atoms,black spheres represent oxygen atoms,and shaded spheres represent AS1U1P1-S1S1P0 ions.(KS1U1P1+S1S1P0,HS1U1B13S1U1B0OS1U1P1+S1S1P0 initially present,OHS1U1P1-S1S1P0 initially present and solvent water molecules have been omitted for clarity). -Which picture represents the solution before the equivalence point?

A) (1) B) (2) C) (3) D) (4) A) (1) B) (2) C) (3) D) (4)

What is the molar solubility of Mg(OH)2 in a basic solution with a pH of 12.50? Ksp for Mg(OH)2 is 5.61 × 10-12.

A) 1)8 × 10- 10 M B) 5)6 × 10- 9 M C) 2)4 × 10-6 M D) 1)1 × 10-4 M A) 1)8 × 10- 10 M B) 5)6 × 10- 9 M C) 2)4 × 10-6 M D) 1)1 × 10-4 M

The following pictures represent solutions that contain a weak acid HA and/or its potassium salt KA.Unshaded spheres represent H atoms and shaded spheres represent AS1U1P1-S1S1P0 ions.(KS1U1P1+S1S1P0,HS1U1B13S1U1B0OS1U1P1+S1S1P0,OHS1U1P1-S1S1P0,and solvent HS1U1B12S1U1B0O molecules have been omitted for clarity. ) -Which solution has the largest percent dissociation of HA?

A) (1) B) (2) C) (3) D) (4) A) (1) B) (2) C) (3) D) (4)

What volume of 5.00 × 10-3 M HNO3 is needed to titrate 80.00 mL of 5.00 × 10-3 M Ca(OH)2 to the equivalence point?

A) 10.0 mL B) 40.0 mL C) 80.0 mL D) 160.mL A) 10.0 mL B) 40.0 mL C) 80.0 mL D) 160.mL

The following pictures represent solutions that contain a weak acid HA (pKS1U1B1aS1U1B0 = 5.0)and its potassium salt KA.Unshaded spheres represent H atoms,black spheres represent oxygen atoms,and shaded spheres represent AS1U1P1-S1S1P0 ions.(KS1U1P1+S1S1P0,HS1U1B13S1U1B0OS1U1P1+ S1S1P0initially present,OHS1U1P1- S1S1P0initially present and solvent water molecules have been omitted for clarity. ) -Which picture represents the equilibrium state of the solution after addition of one H3O+ ion to the solution shown in picture (1)?

A) (2) B) (3) C) (4) D) (5) A) (2) B) (3) C) (4) D) (5)

Exam 15: Applications of Aqueous Equilibria

What is the approximate pH at the equivalence point of a weak acid-strong base titration if 25 mL of aqueous formic acid requires 29.80 mL of 0.3567 M NaOH? K_a =1.8 × 10^-4 For formic acid.

(Multiple Choice)

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Question 61

The following plot shows a titration curve for the titration of 1.00 L of 1.00 M diprotic acid H₂A with NaOH. -Which point a-d represents the HX^-/X2^- buffer region?

(Multiple Choice)

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Question 62

The following plot shows a titration curve for the titration of 1.00 L of 1.00 M diprotic acid H₂A with NaOH. -Which point a-d represents the first equivalence point?

(Multiple Choice)

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Question 63

Which of the following metal hydroxides are amphoteric?

(Multiple Choice)

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Question 64

What is the approximate value of the equilibrium constant,K_n,for the neutralization of pyridine with hydrochloric acid,shown in the equation below? The K_b for pyridine is 1.8 × 10^-9. HCl(aq)+ C₅H₅N(aq)⇌ C₅H₅NHCl(aq)

(Multiple Choice)

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Question 65

The following pictures represent solutions of CuS,which may also contain ions other than Cu²⁺ and S^2- which are not shown.Gray spheres represent Cu²⁺ ions and dotted spheres represent S^2- ions. -If solution (1)is a saturated solution of CuS,which of solutions (2)-(4)are supersaturated?

(Multiple Choice)

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Question 66

What is the K_a of the amino acid glutamine if it is 33.0% dissociated at pH = 8.82?

(Short Answer)

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Question 67

The following pictures represent solutions at various stages in the titration of a weak diprotic acid H₂A with aqueous KOH.Unshaded spheres represent H atoms,black spheres represent oxygen atoms,and shaded spheres represent A^2- ions.(K⁺,H₃O⁺ initially present,OH^- initially present and solvent water molecules have been omitted for clarity). -Which picture represents the system with the highest pH?

(Multiple Choice)

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Question 68

What is the molar solubility of AgCl in 0.20 M NH₃? K_sp for AgCl is 1.8 × 10^-10 and K_f for Ag(NH₃)₂⁺ is 1.7 × 10⁷.

(Multiple Choice)

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Question 69

The following pictures represent solutions at various points in the titration of a weak acid HA with aqueous KOH.Unshaded spheres represent H atoms,black spheres represent oxygen atoms,and shaded spheres represent A^- ions.(K⁺,H₃O⁺ initially present,OH^- initially present and solvent water molecules have been omitted for clarity). -Which picture represents the solution before the equivalence point?

(Multiple Choice)

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Question 70

What is the pH at the equivalence point of a weak acid-strong base titration?

(Multiple Choice)

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Question 71

What is the most soluble salt of the following set?

(Multiple Choice)

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Question 72

What is the molar solubility of Mg(OH)₂ in a basic solution with a pH of 12.50? K_spfor Mg(OH)₂ is 5.61 × 10^-12.

(Multiple Choice)

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Question 73

What is the hydronium ion concentration in a solution prepared by mixing 50.00 mL of 0.10 M HCN with 50.00 mL of 0.030 M NaCN? Assume that the volumes of the solutions are additive and that K_a = 4.9 × 10^-10 for HCN.

(Multiple Choice)

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Question 74

The following pictures represent solutions that contain a weak acid HA and/or its potassium salt KA.Unshaded spheres represent H atoms and shaded spheres represent A^- ions.(K⁺,H₃O⁺,OH^-,and solvent H₂O molecules have been omitted for clarity. ) -Which solution has the largest percent dissociation of HA?

(Multiple Choice)

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Question 75

Which of the following titrations result in a basic solution at the equivalence point?

(Multiple Choice)

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Question 76

The neutralization constant K_n for the neutralization of penicillin V (C₁₆H₁₈N₂O₅S)and erythromycin (C₃₇H₆₇NO₁₃)is 1.3 × 10⁶.The acid dissociation constant K_a for penicillin V is 2.0 × 10^-3.What is the base dissociation constant K_b for erythromycin?

(Short Answer)

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Question 77

What volume of 5.00 × 10^-3 M HNO₃ is needed to titrate 80.00 mL of 5.00 × 10^-3 M Ca(OH)₂ to the equivalence point?

(Multiple Choice)

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Question 78

The following pictures represent solutions that contain a weak acid HA (pK_a = 5.0)and its potassium salt KA.Unshaded spheres represent H atoms,black spheres represent oxygen atoms,and shaded spheres represent A^- ions.(K⁺,H₃O⁺initially present,OH^-initially present and solvent water molecules have been omitted for clarity. ) -Which picture represents the equilibrium state of the solution after addition of one H₃O⁺ ion to the solution shown in picture (1)?

(Multiple Choice)

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Question 79

At what pH is the amino acid glycine with a K_a of 2.51 × 10^-10 sixty-six (66%)percent dissociated?

(Multiple Choice)

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Question 80

Showing 61 - 80 of 190

What is the approximate pH at the equivalence point of a weak acid-strong base titration if 25 mL of aqueous formic acid requires 29.80 mL of 0.3567 M NaOH? K_a =1.8 × 10^-4 For formic acid.

The following plot shows a titration curve for the titration of 1.00 L of 1.00 M diprotic acid H₂A with NaOH. -Which point a-d represents the HX^-/X2^- buffer region?

The following plot shows a titration curve for the titration of 1.00 L of 1.00 M diprotic acid H₂A with NaOH. -Which point a-d represents the first equivalence point?

Which of the following metal hydroxides are amphoteric?

What is the approximate value of the equilibrium constant,K_n,for the neutralization of pyridine with hydrochloric acid,shown in the equation below? The K_b for pyridine is 1.8 × 10^-9. HCl(aq)+ C₅H₅N(aq)⇌ C₅H₅NHCl(aq)

The following pictures represent solutions of CuS,which may also contain ions other than Cu²⁺ and S^2- which are not shown.Gray spheres represent Cu²⁺ ions and dotted spheres represent S^2- ions. -If solution (1)is a saturated solution of CuS,which of solutions (2)-(4)are supersaturated?

What is the K_a of the amino acid glutamine if it is 33.0% dissociated at pH = 8.82?

What is the molar solubility of AgCl in 0.20 M NH₃? K_sp for AgCl is 1.8 × 10^-10 and K_f for Ag(NH₃)₂⁺ is 1.7 × 10⁷.

What is the pH at the equivalence point of a weak acid-strong base titration?

What is the most soluble salt of the following set?

What is the molar solubility of Mg(OH)₂ in a basic solution with a pH of 12.50? K_spfor Mg(OH)₂ is 5.61 × 10^-12.

What is the hydronium ion concentration in a solution prepared by mixing 50.00 mL of 0.10 M HCN with 50.00 mL of 0.030 M NaCN? Assume that the volumes of the solutions are additive and that K_a = 4.9 × 10^-10 for HCN.

Which of the following titrations result in a basic solution at the equivalence point?

The neutralization constant K_n for the neutralization of penicillin V (C₁₆H₁₈N₂O₅S)and erythromycin (C₃₇H₆₇NO₁₃)is 1.3 × 10⁶.The acid dissociation constant K_a for penicillin V is 2.0 × 10^-3.What is the base dissociation constant K_b for erythromycin?

What volume of 5.00 × 10^-3 M HNO₃ is needed to titrate 80.00 mL of 5.00 × 10^-3 M Ca(OH)₂ to the equivalence point?

At what pH is the amino acid glycine with a K_a of 2.51 × 10^-10 sixty-six (66%)percent dissociated?

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Exam 15: Applications of Aqueous Equilibria

What is the approximate pH at the equivalence point of a weak acid-strong base titration if 25 mL of aqueous formic acid requires 29.80 mL of 0.3567 M NaOH? Ka =1.8 × 10-4 For formic acid.

The following plot shows a titration curve for the titration of 1.00 L of 1.00 M diprotic acid H2A with NaOH. -Which point a-d represents the HX-/X2- buffer region?

The following plot shows a titration curve for the titration of 1.00 L of 1.00 M diprotic acid H2A with NaOH. -Which point a-d represents the first equivalence point?

Which of the following metal hydroxides are amphoteric?

What is the approximate value of the equilibrium constant,Kn,for the neutralization of pyridine with hydrochloric acid,shown in the equation below? The Kb for pyridine is 1.8 × 10-9. HCl(aq)+ C5H5N(aq)⇌ C5H5NHCl(aq)

The following pictures represent solutions of CuS,which may also contain ions other than Cu2+ and S2- which are not shown.Gray spheres represent Cu2+ ions and dotted spheres represent S2- ions. -If solution (1)is a saturated solution of CuS,which of solutions (2)-(4)are supersaturated?

What is the Ka of the amino acid glutamine if it is 33.0% dissociated at pH = 8.82?

What is the molar solubility of AgCl in 0.20 M NH3? Ksp for AgCl is 1.8 × 10-10 and Kf for Ag(NH3)2+ is 1.7 × 107.

What is the pH at the equivalence point of a weak acid-strong base titration?

What is the most soluble salt of the following set?

What is the molar solubility of Mg(OH)2 in a basic solution with a pH of 12.50? Ksp for Mg(OH)2 is 5.61 × 10-12.

What is the hydronium ion concentration in a solution prepared by mixing 50.00 mL of 0.10 M HCN with 50.00 mL of 0.030 M NaCN? Assume that the volumes of the solutions are additive and that Ka = 4.9 × 10-10 for HCN.

Which of the following titrations result in a basic solution at the equivalence point?

The neutralization constant Kn for the neutralization of penicillin V (C16H18N2O5S)and erythromycin (C37H67NO13)is 1.3 × 106.The acid dissociation constant Ka for penicillin V is 2.0 × 10-3.What is the base dissociation constant Kb for erythromycin?

What volume of 5.00 × 10-3 M HNO3 is needed to titrate 80.00 mL of 5.00 × 10-3 M Ca(OH)2 to the equivalence point?

At what pH is the amino acid glycine with a Ka of 2.51 × 10-10 sixty-six (66%)percent dissociated?

Chemistry: Matter and Measurement

Atoms, molecules, and Ions

Formulas, equations, and Moles

Reactions in Aqueous Solutions

Periodicity and the Atomic Structure of Atoms

Ionic Bonds and Some Main-Group Chemistry

Covalent Bonds and Molecular Structure

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What is the approximate pH at the equivalence point of a weak acid-strong base titration if 25 mL of aqueous formic acid requires 29.80 mL of 0.3567 M NaOH? K_a =1.8 × 10^-4 For formic acid.

The following plot shows a titration curve for the titration of 1.00 L of 1.00 M diprotic acid H₂A with NaOH. -Which point a-d represents the HX^-/X2^- buffer region?

The following plot shows a titration curve for the titration of 1.00 L of 1.00 M diprotic acid H₂A with NaOH. -Which point a-d represents the first equivalence point?

What is the approximate value of the equilibrium constant,K_n,for the neutralization of pyridine with hydrochloric acid,shown in the equation below? The K_b for pyridine is 1.8 × 10^-9. HCl(aq)+ C₅H₅N(aq)⇌ C₅H₅NHCl(aq)

The following pictures represent solutions of CuS,which may also contain ions other than Cu²⁺ and S^2- which are not shown.Gray spheres represent Cu²⁺ ions and dotted spheres represent S^2- ions. -If solution (1)is a saturated solution of CuS,which of solutions (2)-(4)are supersaturated?

What is the K_a of the amino acid glutamine if it is 33.0% dissociated at pH = 8.82?

What is the molar solubility of AgCl in 0.20 M NH₃? K_sp for AgCl is 1.8 × 10^-10 and K_f for Ag(NH₃)₂⁺ is 1.7 × 10⁷.

What is the molar solubility of Mg(OH)₂ in a basic solution with a pH of 12.50? K_spfor Mg(OH)₂ is 5.61 × 10^-12.

What is the hydronium ion concentration in a solution prepared by mixing 50.00 mL of 0.10 M HCN with 50.00 mL of 0.030 M NaCN? Assume that the volumes of the solutions are additive and that K_a = 4.9 × 10^-10 for HCN.

The neutralization constant K_n for the neutralization of penicillin V (C₁₆H₁₈N₂O₅S)and erythromycin (C₃₇H₆₇NO₁₃)is 1.3 × 10⁶.The acid dissociation constant K_a for penicillin V is 2.0 × 10^-3.What is the base dissociation constant K_b for erythromycin?

What volume of 5.00 × 10^-3 M HNO₃ is needed to titrate 80.00 mL of 5.00 × 10^-3 M Ca(OH)₂ to the equivalence point?

At what pH is the amino acid glycine with a K_a of 2.51 × 10^-10 sixty-six (66%)percent dissociated?