A student tests two substances: solid $$\(\mathbf{H}\)$$ and solution $$\(\mathbf{I}\)$$. Tests on solid H Solid $$\(\mathbf{H}\)$$ is barium carbonate. Complete the expected observations. The student adds an excess of dilute nitric acid to the sample of solid $$\(\mathbf{H}\)$$ in a boiling tube and tests any gas produced. observations ................................................................................................................... ......................................................................................................................................... . ................................................................................................................................... (ii) Identify the gas made in (a)(i). ................................................................................................................................... The solution produced in (a)(i) is solution J. The student divides solution J into four approximately equal portions.

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