The carbonate ion, CO32-, forms when carbon dioxide gas, CO2, from the air disso

Question

The carbonate ion, CO32-, forms when carbon dioxide gas, CO2, from the air dissolves in water. Therefore it is present in the water solutions that contain the cations and anions separated and identified in Parts B and C of the experiment. The CO32- ion reacts with Ag+ ions just as do the S2-, Br-, and I- ions. Look for this spot characteristic of this ion on the chromatogram of Part C. How can you identify it?

a) It should be found on every anion chromatogram.

b) It should be found only on the S2- chromatogram.

c) It should be found only on the Br- chromatogram.

d) It should be found only on the I- chromatogram

e) It should be found only on the chromatogram of the mixed ion sample

Explanation / Answer

The carbonate ion is present in the water solutions that contain the cations and anions separated and identified in Parts B and C of the experiment. Hence, It should be found on every anion chromatogram. So option A is the correct answer.

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