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chemistry question?
A geochemist looking for new minerals makes the following observations.
a. Sample A dissolves in hydrochloric acid, but no gas is released.
b. Sample B does not react with hydrochloric acid.
c. Sample C dissolves in hydrochloric acid and bubbles of a colorless, odorless gas form.
Based on these tests, what can be said about the chemical composition of each of these samples.
1 Answer
- pisgahchemistLv 74 years ago
Chemical composition.....
There are lots of possibilities based on these vague observations. Perhaps (c) is the most useful. Chances are, the sample is a metal carbonate since carbonates react with HCl to produce CO2 gas (an odorless, colorless gas)
Sample (a) may be a metal oxide or hydroxide since these often react with acids, but are usually insoluble in water.
Sample (b) could be a nonmetal oxide (i.e. SiO2) or an element which is either a solid nonmetal (i.e. C) or a metal which is found below hydrogen in the activity series (i.e. Cu, Ag, Au, Pt).
