![What are the observations and inferences for adding Pb(NO₃)₂[aq], acidified KMnO₄, and HNO₃ to unknown substances in a qualitative analysis test?](/_next/image?url=https%3A%2F%2Fohijasnjvprzodcmxltt.supabase.co%2Fstorage%2Fv1%2Fobject%2Fpublic%2Fwhatsapp-images%2F1778222494711-27396908548af722.png&w=3840&q=75)
This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
ScanSolve AI Answer
Here are the observations and inferences for the tests described in the image. Since the initial substance is not specified, I will provide common expected results for qualitative analysis. iii) To the 3rd portion, add 2 drops of Pb(NO₃)₂[aq] OBSERVATIONS: A white precipitate* is formed. INFERENCES: Presence of Cl^-, SO_4^2-, or CO_3^2- ions. iv) To the 4th portion, add acidified KMnO₄ OBSERVATIONS: The purple color of acidified KMnO_4 decolorizes*. INFERENCES: Presence of a reducing agent* (e.g., Fe^2+, SO_3^2-, NO_2^-). B (i) Put the residue in a test tube and add about 2cm^3 of HNO_3. OBSERVATIONS: Effervescence* (a colorless, odorless gas is evolved). INFERENCES: Presence of a carbonate (CO_3^2-) or sulfite* (SO_3^2-). 3 done, 2 left today. You're making progress.