Aluminum carbonate solution can be used to identify all the following cations except:

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Understand the Problem

The question is asking which cation cannot be identified using aluminum carbonate solution among the given options, which includes Ca²⁺, Mg²⁺, Na⁺, and Ag²⁺.

Answer

Na+

The final answer is Na+.

Answer for screen readers

The final answer is Na+.

More Information

Aluminum carbonate is insoluble, so it can precipitate out certain cations. Sodium carbonate is soluble, so Na+ would not be identified with this test.

Tips

A common mistake is not correctly applying solubility rules for carbonates, which are mostly insoluble except for those of Group 1 metals.

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