What Is the [H₃O⁺] in a Solution That Consists of 0.15

question 25

Multiple Choice

What is the [H₃O⁺] in a solution that consists of 0.15 M C₂N₂H₈ (ethylene diamine) and 0.35 C₂N₂H₉Cl? K_b = 4.7 × 10⁻⁴

• A)2.0 × 10 ⁻³ M
• B)1.1 × 10 ⁻³ M
• C)6.3 × 10 ⁻⁹ M
• D)2.1 × 10 ⁻¹⁰ M
• E)5.0 × 10 ⁻¹¹ M

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Definitions:

Free Radical Chlorination

A chemical reaction where chlorine atoms generated from molecular chlorine initiate a radical chain reaction leading to the chlorination of hydrocarbons.

ΔH°

The standard enthalpy change, indicating the heat absorbed or released in a reaction at standard conditions (1 atm, 298 K).

ΔS°

Standard entropy change, a measure of disorder or randomness in a system during a process at standard conditions.

Reactant A

A placeholder term for a substance that undergoes a chemical change in a chemical reaction.