CaCO3 + H2SO4 ==> CaSO4 + H2O + CO2. CaSO4 is a white ppt and the CO2 will snuff out the match flame.
Mg + 2HCl ==> H2 + MgCl2. H2 fizzes and will burn (explode--a minimal one at the mouth of the test tube).
Mg reacts with HNO3 to give various compounds depending upon the strength of the HNO3. It CAN give NH3 which is recognized by the odor. It may give oxides of N, notably NO2 which is reddish brown. It CAN give NO, which is colorless, but isn't flammable like H2 gas.
You can use this information to set up a procedure.
Three bottles lost their labels. One contained an aqueous solution of HCl, another an aqueous solution of HNO3, and the third contained an aqueous solution of H2SO4. Write an experimental procedure that would allow you to correctly identify the contents of the bottles using the following equipment: Mg, CaCO3, matches, test tubes, stirring rod, spatula (scoop). I would really appreciate help, thanks!
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