anions - carbonate, halide and sulfate ions
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10 Terms
how does the test for carbonate ions work?
add dilute hcl to the substance, and connect through a tube and run the gas through limewater
what does a positive result look like for carbonate ions?
effervescence, and the limewater turns cloudy
how to do the sulfate ion test?
add dilute hcl to acidify the solution, add a couple drops of barium chloride
why is hcl added first to the sulfate ion test?
hcl is first added to remove any carbonate that would also produce a precipitate
what does a positive sulfate ion test look like?
white precipitate in the solution
how to do the halide ion test?
add nitric acid to the substance, and then silver nitrate
what does a positive halide ion test result look like?
precipitate is made
halide ion result for chloride?
white
halide ion result for bromide?
cream
halide ion result for iodide?
yellow