Advanced Placement (AP) Biology Practice Exam

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What is the ionization constant for sucrose?

The correct answer is: 1

Sucrose is a non-ionic compound and does not dissociate into ions when dissolved in water. The ionization constant, which reflects the number of particles a substance breaks into when it dissolves, is specifically relevant for ionic compounds that dissociate into their respective cations and anions. Since sucrose does not ionize in solution, its ionization constant is expressed as zero. Therefore, the correct understanding is that fer sucrose, the ionization constant is 0, indicating that it remains as a single molecule when in solution.