Autoionization of Water
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Questions and Answers

What is the term used to describe the self-ionization of water?

  • Neutralization
  • Dissociation
  • Hydration
  • Autoionization (correct)

In the autoionization of water, what ions are formed in a 1:1 molar ratio?

  • Sodium and chloride ions
  • Proton and electron
  • Carbonate and bicarbonate ions
  • Hydronium and hydroxide ions (correct)

What happens to the concentrations of hydronium and hydroxide ions in pure water?

  • Hydronium concentration is higher
  • Hydroxide concentration is higher
  • They are not present
  • They are equal (correct)

How is a molecule acting as an acid defined in relation to proton donation?

<p>Donates a proton to another molecule (B)</p> Signup and view all the answers

What is the molar ratio of hydronium and hydroxide ions when water undergoes autoionization?

<p>1:1 (B)</p> Signup and view all the answers

What does the autoionization constant help determine in aqueous solutions?

<p>Concentrations of hydronium and hydroxide ions (D)</p> Signup and view all the answers

In what form do hydronium and hydroxide ions exist in pure water compared to non-ionized water?

<p>In extremely small concentrations (C)</p> Signup and view all the answers

What is the common name used to refer to the dissociation constant, as mentioned in the text?

<p>Kw constant (D)</p> Signup and view all the answers

At 25 degrees C, the concentration of hydronium ions in pure water is approximately:

<p>$10^{-7}$ M (C)</p> Signup and view all the answers

What is the negative logarithm of the Kw constant?

<p>$-14$ (A)</p> Signup and view all the answers

In the pH scale, what does a high pH value indicate?

<p>High hydroxide ion concentration (D)</p> Signup and view all the answers

When a solution becomes more acidic, what happens to the concentration of hydronium ions?

<p>Increases (D)</p> Signup and view all the answers

Which principle describes the shift in equilibrium when an acid is added to pure water?

<p>Le Chatelier's principle (C)</p> Signup and view all the answers

What happens to the product of hydronium and hydroxide ions concentrations in acidic solutions compared to pure water?

<p>Becomes less than Kw (B)</p> Signup and view all the answers

"p" represents the negative logarithm of:

<p>$[H_3O^+]$ (B)</p> Signup and view all the answers

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