The Concentration of H₃O⁺ in a Solution Is 5 ×

question 92

Multiple Choice

The concentration of H₃O⁺ in a solution is 5 × 10^-4 M at 25°C.What is its hydroxide-ion concentration? (K_w = 1.01 × 10^-14)

• A) 5 × 10^-4 M
• B) 2 × 10^-10 M
• C) 3 × 10^-10 M
• D) 4 × 10^-10 M
• E) 2 × 10^-11 M

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Definitions:

Diluting

The process of reducing the concentration of a solute in a solution, usually by adding more solvent.

Molarity

An indicator of solute density within a solution, measured in moles per liter of the solution.

NaCl

Sodium chloride, commonly known as table salt, an ionic compound formed from the chemical reaction between sodium and chlorine.

Molarity

A concentration measurement defined as the moles of a solute per liter of solution.