Acids and Bases: pH in Human Blood

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Questions and Answers

If a solution has a pH between 8 and 14, it is classified as:

  • Acidic
  • Amphoteric
  • Neutral
  • Basic (correct)

Which of the following substances is an example of a soluble base or alkali?

  • Carbon dioxide (CO2)
  • Sodium hydroxide (NaOH) (correct)
  • Acetic acid (CH3COOH)
  • Hydrochloric acid (HCl)

What is the characteristic property of alkalis?

  • They are insoluble in water
  • They release hydroxide ions (OH-) in aqueous solutions (correct)
  • They release hydrogen ions (H+) in aqueous solutions
  • They have a pH less than 7

Which of the following equations represents the dissociation of a soluble base in water?

<p>NaOH → Na+ + OH- (C)</p> Signup and view all the answers

What is the pH range of a solution that is considered alkaline?

<p>pH &gt; 7 (B)</p> Signup and view all the answers

Which of the following statements correctly describes the relationship between an acid and its conjugate base?

<p>The conjugate base has one fewer proton than the acid. (A)</p> Signup and view all the answers

If a diprotic acid, H₂A, ionizes completely in water, what would be the pH of the resulting solution?

<p>pH &lt; 7.0 (D)</p> Signup and view all the answers

Which of the following statements correctly describes the strength of a triprotic acid?

<p>The strength of a triprotic acid depends on the values of its three dissociation constants. (A)</p> Signup and view all the answers

For a monoprotic acid, HA, which of the following expressions represents the acid ionization constant (Ka)?

<p>Ka = [HA] / ([H₃O⁺][A⁻]) (D)</p> Signup and view all the answers

If a weak acid, HA, has a Ka value of 1.0 × 10⁻⁵, what can be inferred about the strength of its conjugate base, A⁻?

<p>The conjugate base is a weak base. (D)</p> Signup and view all the answers

Flashcards

What is a basic solution?

A solution with a pH greater than 7 is considered basic or alkaline.

Example of a soluble base?

Sodium hydroxide (NaOH) is a soluble base that dissolves in water to release hydroxide ions (OH-), making the solution alkaline.

What are alkalis?

Alkalis are bases that dissolve in water to release hydroxide ions (OH-) in solution.

Dissociation of a soluble base?

The dissociation of a soluble base in water involves the release of a hydroxide ion.

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pH of an alkaline solution?

The pH of an alkaline solution is greater than 7.

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Relationship between an acid and its conjugate base?

A conjugate base is formed when an acid loses a proton.

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pH of a completely ionized diprotic acid?

A diprotic acid, like H₂A, can donate two protons, leading to a solution with a pH less than 7.

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Strength of a triprotic acid?

The strength of a triprotic acid is determined by its three dissociation constants.

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Acid ionization constant (Ka)?

The acid ionization constant (Ka) expresses the strength of a weak acid.

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Conjugate base of a weak acid?

A weak acid's conjugate base will be a weak base.

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