tests for anions

Cards (4)

tests for anions often give precipitates
how do you test for carbonates?
add a few drops of dilute acid to a test tube with a dropping pipette and then connect this test tube to a test tube containing limewater. if the carbonate ions are present the reaction will release carbon dioxide which will turn the limewater cloudy
how do you test for sulphates?
using a dropping pipette add a few drops of dilute hydrochloric acid and barium chloride solution to the test tube. if the sulphate ions are present a white precipitate will be formed
how do you test for halides?
add a couple of drops of dilute nitric acid then silver nitrate solution
a chloride gives a white precipitate
a bromide gives a cream precipitate
a iodine gives a yellow precipitate