Chemistry 3 - identifying unknown substances tests for cations, anions 4.0 / 5 based on 5 ratings ? ChemistryTesting and analysing substancesGCSEAll boards Created by: HollyCreated on: 11-01-10 21:00 My unknown substance burns with a green flame. When I add HNO3 and AgNO3 I get a yellow precipitate. What is the substance? Barium Iodide 1 of 9 If I add sodium hydroxide to my uknown substance and get a white precipitate, what is NOT in my substance? Copper 2 of 9 If I add HCl to my uknown substance and then Barium choride and get a precipitate.What is my substance? A Sulphate 3 of 9 A smelly gas is given off when I add HCL and NaOH to my substance, what is it? NH3 4 of 9 I heat my substance strongly and then cool it, what is it if it goes from green to black? Copper Carbonate 5 of 9 What if I heat and cool it and it goes from white to yellow, and back to white again? Zinc Carbonate 6 of 9 If I add bromine water to my substance and it goes clear then what is in my substance? C=C bonds 7 of 9 If I burn a Hydrocarbon in Air and collect 22g of CO2 and 27g of H20, what is the empirical formula of my Hydrocarbon? C2H 8 of 9 If I add HCl and NAOH to my substance, and I obtain both a blue precipitate and a Gas which turns red litmus paper blue; what is my substance? Copper Nitrate 9 of 9
Comments
No comments have yet been made