Question detail
Write the ionic equation for the displacement reaction of iodine with sodium chloride.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Group 7(17), the halogens
Question
Write the ionic equation for the displacement reaction of iodine with sodium chloride.
Answer
No reaction occurs.
Explanation
This question assesses understanding of halogen reactivity and displacement reactions. The answer indicates that iodine cannot displace chlorine from sodium chloride, reflecting knowledge of the trend in oxidising ability down Group 7.
Common mistake
Common Mistake in Writing Ionic Equations
Students often forget to balance the charges in ionic equations for halogen displacement reactions.
To write a correct ionic equation, ensure that the total charge on both sides is equal. For example, when writing the equation for the displacement of bromine by chlorine, start with Cl2 + 2Br- → 2Cl- + Br2. Check that the charges balance: 0 on the left and -2 on the right, which is incorrect. Adjust to ensure both sides have the same total charge.
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