Use the Debye^-Hückel Limiting Law to Determine the Mean Activity

question 7

Multiple Choice

Use the Debye^-Hückel limiting law to determine the mean activity coefficient for the Ca²⁺ and NO₃^- ions in a 0.005 mol dm^-3 aqueous solution of calcium nitrate, Ca(NO₃) ₂.

• A) 0.94
• B) 0.97
• C) 0.75
• D) 0.12

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Definitions:

Reaction Rates

A measure of how quickly the concentration of reactants decreases or the concentration of products increases over time in a chemical reaction.

Free Radical

An atom, molecule, or ion that has an unpaired valence electron, making it highly reactive and prone to participating in chemical reactions.

Chlorination

The process of adding chlorine to water or organic molecules, either for disinfection purposes or to introduce chlorine atoms into molecules for chemical synthesis.

Propagation Step

A part of a chain reaction where intermediates react with the original reactants to produce more intermediates and products, continually propagating the reaction.