Simple laboratory test for; copper, calcium, carbonate and chloride.
For simple practical purposes, in a laboratory test for an unknown salt. This is what you should do. Test for calcium : in an unknown salt, add few drops of sodium hydroxide solution. Formation of white precipitate will be formed, which is insoluble in excess sodium hydroxide, which indicate the presence of calcium . Test for copper: in an unknown salt solution, add few few drops of ( aq ) ammonia . If copper is present, a pale blue/ light blue precipitate of copper( II ) hydroxide , which dissolve in excess dilute ammonia , to give a deep blue solution. In copper test, the use of sodium hydroxide forms a pale blue precipitate and in excess, it is insoluble. Test for chloride : test for chloride is much lengthy than others. Acidify the unknown solution, with excess dilute trioxonitrate ( v ) acid ( to prevent the precipitation of other salts ), and then add a few drops of silver trioxonitrate (v) or silver nitrate . A white precipitate of silver chloride, which readily dissolve...
