Acids and Bases Flashcards
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Questions and Answers

What is the scale of acidity?

pH

What is H₃O⁺ commonly known as?

hydronium

What is formed from the reaction of an acid and a base?

salt

What is the procedure to determine the concentration of an acid or base?

<p>titration</p> Signup and view all the answers

What type of acid consists of only two elements?

<p>binary</p> Signup and view all the answers

What do you call a solution that resists changes in pH?

<p>buffer</p> Signup and view all the answers

What is a substance that forms hydronium ions in water according to Arrhenius?

<p>acid</p> Signup and view all the answers

What happens when an acid dissolves in water?

<p>ionization</p> Signup and view all the answers

What changes color at the endpoint of titration?

<p>indicator</p> Signup and view all the answers

What is the reaction of an acid with a base called?

<p>neutralization</p> Signup and view all the answers

According to Brønsted-Lowry, an acid is a ___ donor.

<p>proton</p> Signup and view all the answers

What produces hydroxide ions in an aqueous solution according to Arrhenius?

<p>base</p> Signup and view all the answers

According to Brønsted-Lowry, a base is a proton ___.

<p>acceptor</p> Signup and view all the answers

What can act as either an acid or a base?

<p>amphoteric</p> Signup and view all the answers

What are the pairs that differ only by a proton called?

<p>conjugate</p> Signup and view all the answers

What is it called when equivalent amounts of H⁺ and OH⁻ have reacted in a titration?

<p>endpoint</p> Signup and view all the answers

An acid with a small K₀ value would be a ___ acid.

<p>weak</p> Signup and view all the answers

What is the reaction of an ion with H₂O to produce H⁺(aq) + OH⁻(aq) called?

<p>hydrolysis</p> Signup and view all the answers

Flashcards

pH Scale

A measure of the acidity or alkalinity of a solution. It usually ranges from 0 to 14, with lower values indicating higher acidity and higher values indicating higher alkalinity. pH 7 represents neutrality.

Hydronium Ion (H₃O⁺)

An ion formed when an acid donates a proton (H⁺) to a water molecule. It is a key species involved in acid-base reactions.

Salt Formation

A compound formed when the positive ions of a base combine with the negative ions of an acid, effectively neutralizing their reactions.

Titration

A quantitative method to determine the concentration of an acid or a base in a solution. It involves the controlled addition of another solution (titrant) with a known concentration to the analyte until the reaction is complete.

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Binary Acids

Acids composed of two elements, usually hydrogen and a non-metal. They are known for their strong acidic properties.

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Buffer Solutions

Solutions that resist changes in pH when small amounts of acid or base are added. They are crucial for maintaining stable environments in biological systems, like blood.

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Arrhenius Acid

Substances that release hydronium ions (H₃O⁺) when dissolved in water, increasing its acidity.

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Ionization Process

The process by which an acid molecule dissociates in water, releasing hydronium ions (H₃O⁺) and increasing the solution's acidity.

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Indicator

A substance that changes color at the endpoint of a titration, signaling the end of the reaction.

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Neutralization Reaction

The process where an acid reacts with a base, forming water and a salt. This effectively neutralizes the acidic and basic properties of both reactants.

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Proton Donor

An acid according to Brønsted-Lowry theory, characterized by its ability to donate a proton (H⁺) to another substance during a reaction.

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Proton Acceptor

A base according to Brønsted-Lowry theory, characterized by its ability to accept a proton (H⁺) from another substance during a reaction.

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Amphoteric Substances

Substances that can act as either acids or bases depending on the context of the reaction. They can either donate or accept protons, depending on the chemical environment.

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Conjugate Pairs

Acid-base pairs that differ only by one proton (H⁺). They illustrate the reversible nature of acid-base reactions, where the acid can donate a proton to become its conjugate base, and vice versa.

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Titration Endpoint

The point in a titration where equivalent moles of H⁺ and OH⁻ ions have completely reacted, indicating the completion of the neutralization reaction.

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Weak Acids

Acids with a small equilibrium constant (Kₐ), indicating limited dissociation in water. They release fewer hydronium ions (H₃O⁺) compared to strong acids.

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Hydrolysis Reaction

The interaction of an ion with water to produce H⁺ and OH⁻ ions. This process affects pH and plays a significant role in chemical and biological reactions.

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Study Notes

Acids and Bases Concepts

  • pH Scale: Measures the acidity or alkalinity of a solution, with a range typically from 0 to 14.
  • Hydronium Ion (H₃O⁺): The ion formed when an acid donates a proton to water; a key species in acid-base chemistry.
  • Salt Formation: Result of the neutralization reaction between an acid and a base.
  • Titration: A quantitative method to determine the concentration of an acid or base in a solution through controlled addition of a titrant.

Types of Acids and Bases

  • Binary Acids: Acids composed of two elements, usually hydrogen and a non-metal (e.g., HCl).
  • Buffer Solutions: Solutions that minimize changes in pH upon the addition of small amounts of acids or bases, essential for maintaining stable environments.
  • Arrhenius Acid: Substances that release hydronium ions when dissolved in water.
  • Ionization Process: The dissociation of an acid in water, leading to the formation of hydronium ions.

Chemical Reactions and Definitions

  • Indicator: A substance that changes color at the endpoint of a titration, signaling the completion of the reaction.
  • Neutralization Reaction: The process where an acid reacts with a base to form water and a salt, effectively reducing the pH to neutral.

Brønsted-Lowry Theory

  • Proton Donor: An acid according to Brønsted-Lowry theory, characterized by its ability to donate protons (H⁺ ions).
  • Proton Acceptor: A base in the Brønsted-Lowry system, which gains protons during reaction.
  • Amphoteric Substances: Compounds that can function as either acids or bases depending on the context of the reaction.

Chemical Equilibrium Concepts

  • Conjugate Pairs: Acid-base pairs that differ by one proton, illustrating the reversible nature of acid-base reactions.
  • Titration Endpoint: Achieved when equivalent moles of H⁺ and OH⁻ have completely reacted, indicating that neutralization is complete.

Acid Strength

  • Weak Acids: Acids with small equilibrium constants (K₀), illustrating limited dissociation in water.
  • Hydrolysis Reaction: Interaction of an ion with water to produce H⁺ and OH⁻ ions, significant in various chemical and biological processes.

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Test your knowledge of acids and bases with this engaging crossword flashcard quiz. Each card covers key terms and definitions related to the chemistry of acids and bases. Perfect for students looking to enhance their understanding of this fundamental topic.

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