Question
GCSE Science -Chemistry Question 20 of 47 Complete the following sentence. In a strong acid, about what proportion of the molecules have become ions? If depends on the concentration. holf of them all of them nono of them
Answer
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(233 Votes)
Eilidh
Master · Tutor for 5 years
Answer
"All of them"
Explanation
## Step 1: Understand the properties of a strong acid. A strong acid completely ionizes or dissociates in a water solution. This means when a strong acid is in water, all its molecules will split into cations (positive ions) and anions (negative ions).## Step 2: Evaluate each option in relation to the strong acid's properties. ### Option A: "It depends on the concentration."Regardless of concentration, a strong acid completely ionizes in water. While concentration does alter the amount of acid molecules present in the solution, it doesn't impact the proportion of molecules that have become ions. Therefore, Option A is incorrect.### Option B: "Half of them."Considering a strong acid's inherent capability to completely dissociate, indicating only half of the molecules would ionize, contradicts the standard definition of a strong acid. Therefore, Option B is also inaccurately describing the behaviour of a strong acid.### Option C: "All of them."The assertion fully aligns with a strong acid's properties as by definition, "all" of a strong acid's molecules dissociate into ions when considering a water solution. Therefore, this option C correctly describes a strong acid.### Option D: "None of them."This scenario is opposite to what a strong acid does when in a water solution, thereby making it instantly incorrect. Even the weakest acids partially ionize in water, whereas strong acids completely do so. Hence, option D is not a viable option.## Step 3:Confirm the conclusion with the evaluation from Step 2.