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Saturated Solutions and Solubility

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Questions and Answers

What does H2O molecule do in pure water according to the text?

Can both donate and accept a proton simultaneously (correct)
Remains unchanged and does not participate in any reactions
Accepts a proton and acts as a base
Donates a proton and acts as an acid

Which ratio can be used to represent the dissociated water to undissociated water?

$10^{-9} / 55.55$
$10^{-7} / 1000$
$10^{-5} / 55.55$
$10^{-7} / 55.55$ (correct)

What distinguishes acidic, neutral, and basic aqueous solutions?

[H3O+] varies independently of [OH-]
[H3O+] > [OH-] (correct)
[H3O+] = [OH-]
[H3O+] < [OH-]

How is the pH of a solution defined?

Negative logarithm to base 10 of the activity of hydrogen ions (A) Signup and view all the answers

What is the relationship between activity and molarity of hydrogen ions?

Activity can be less or greater than molarity depending on the solution (A) Signup and view all the answers

In a basic aqueous solution, how do [H3O+] and [OH-] concentrations compare?

[H3O+] < [OH-] (A) Signup and view all the answers

Why is measurement of pH essential when dealing with biological and cosmetic applications?

To understand the acidic or basic nature of the solutions (D) Signup and view all the answers

What is the equilibrium towards in pure water?

$[H2O]$ (C) Signup and view all the answers

How is the hydronium ion concentration more conveniently expressed?

$-log_{10}[H+]$ (D) Signup and view all the answers

What determines whether a solution is acidic, neutral, or basic?

Hydrogen ion and hydroxide ion concentrations (D) Signup and view all the answers

Why is the pH scale preferred over direct molarity measurements for hydrogen ions?

pH scale provides a convenient logarithmic representation (B) Signup and view all the answers