A solution holds 0.0400 mol of benzenediazonium chloride…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
A solution holds of benzenediazonium chloride. It is added to copper(I) chloride in hydrochloric acid, and chlorobenzene, (), forms in a yield of . Find the mass of chlorobenzene at a yield of 100 %. Then find the mass collected. Last, find the volume of nitrogen given off at 273 K and 1 atm if the reaction went to completion.
Need a reminder? The key ideaShow
Diazotisation: , at 273 to 278 K. Each mole of salt that reacts to replace the diazonium group gives one mole of nitrogen gas, and one mole of gas is at 273 K and 1 atm. The yields of consecutive steps multiply.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. At 100 %. .
Step 2. Collected. .
Step 3. Nitrogen. .
Answer: , and .
Check. The salt has lost two nitrogen atoms and gained nothing, and has moved from the counter ion to the ring.
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