Acids, Bases, and Salts Quiz PAGE 1

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Questions and Answers

What happens when an acid reacts with a base?

  • A decomposition reaction occurs, forming hydrogen gas
  • An oxidation-reduction reaction occurs, forming a metal oxide
  • An acidic reaction occurs, forming water
  • A neutralization reaction occurs, forming a salt (correct)

What gases are produced when hydrochloric acid reacts with water?

  • Hydrogen gas (correct)
  • Hydrogen gas and oxygen gas
  • Carbon dioxide gas and hydrogen gas
  • Helium gas and nitrogen gas

How are acid molecules classified when not dissolved in water?

  • Ionic solids
  • Metallic compounds
  • Covalent molecules (correct)
  • Non-metallic solutions

What defines an acid according to the text?

<p>A substance that contains hydrogen and can form a salt (C)</p>
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How are hydrogen ions (H+) described in aqueous acids?

<p>'Hydro' ions (D)</p>
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In a reaction where an acid donates its H+ ions, what is the acid commonly referred to as?

<p>A proton donor (C)</p>
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How are acids and bases described in terms of their properties?

<p>Acids and bases have opposite properties and have the ability to neutralize each other.</p>
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What is always formed when an acid reacts with a base?

<p>A salt is always formed.</p>
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How do acid molecules behave when added to water?

<p>Acid molecules ionize in water, forming positive hydrogen ions (H+ ions) and negative anions.</p>
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How can an acid be defined based on its hydrogen content?

<p>An acid is a substance containing hydrogen that can be replaced directly or indirectly by a metal to form a salt.</p>
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What is a hydrogen ion (H+) in aqueous acids?

<p>Hydrogen ions (H+) are single protons.</p>
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What occurs when an acid reacts with a base?

<p>A salt is formed.</p>
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Study Notes

Acid-Base Reactions

  • When an acid reacts with a base, a salt and water are always formed.
  • Hydrochloric acid reacts with water to produce hydrogen ions (H+) and chloride ions (Cl-).

Acid Classification

  • Acid molecules are classified as Arrhenius acids when not dissolved in water.
  • An acid is defined as a substance that donates a hydrogen ion (H+) in a reaction.

Hydrogen Ions

  • Hydrogen ions (H+) in aqueous acids are highly reactive and will readily donate a proton.
  • In a reaction where an acid donates its H+ ions, the acid is commonly referred to as a proton donor.

Acid-Base Properties

  • Acids and bases are described in terms of their ability to donate or accept protons (H+ ions).
  • Acids are characterized by their ability to donate H+ ions, while bases are characterized by their ability to accept H+ ions.

Acid Behavior

  • When acid molecules are added to water, they dissociate into hydrogen ions (H+) and negatively charged ions.
  • An acid can be defined as a substance that releases H+ ions in aqueous solutions.
  • A hydrogen ion (H+) in aqueous acids is a positively charged ion formed when an acid donates a proton.

Acid-Base Reaction Products

  • The reaction between an acid and a base always forms a salt and water.

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