Question

Report Sheet Questions and Problems 0.1 How do the tests on known solutions containing cations and anions man to identify the cations or anions in an unknown substance hown solutions containing cations and anions make it possible for you on Mat is composed of either NaCl or CaCl. What tests would you run to identify the compound? Q.3 If tap water turns a deep red color with a few drops of KSCN, what cation is present? 0.4 A plant food contains (NH), PO.. What tests would you run to verify the presence of the NH, ion and the PO, ion? 0,5 Write the symbol of the cation or anion that give(s) the following reaction: a. Forms a precipitate with AgNo, that does not dissolve in HNO. b. Forms a gas with HCI c. Gives a bright, yellow-orange flame test d. Forms a precipitate with BaCl, that does not dissolve in HNO.

Answer 1

d. 1 After - After testing the known solutions containing lations and anions , we will subject the Unknown Substance to those same tests. We will be able to determine the Unknown compounds identity by matching its characteristic reactions with those of the known samples. &2 - of we add Na, co, (sodium Carbonate) to both the solutions : for Nach - No reaction for cach Immediately la CO₂ Calcium carbonale) precipitated Cach & Nazcoz - Ca CO₂ & + 2 Nach White ppt Fe3+ Cation is present. Feat lag) + SCN- (aq) → FeSCN at las) 1 Red Coloured Complex 84. w Addition of concentrated Nash nhat lag) + oH" Cag) heas Nity (ag) + Holly The pungent Smelling with gas turns moistened red litmus paper blue. (6) To the HNO3 extract of the solution, add ammonium molibdale solution. Warm gently. formation of ļ yellow ppt indicates the presence of PO43-. 2- PO3 - + 12 Mo Oat + 24 HP + 3 NHA - 45. a. ci (AgNO + ct Agullt No;) + 12 H₂O b. Mn4+ (Mwong +9HCl → MnCl2 +2+20 +24127) c. Nat - d. 50,2- ( 5072- + Bad, – Basor + + 24-) cs Scanned with CamScanner DA 3 L +

Electron - Dot structure Eleetion Element ! At No. Election Electron arrangement dot str. Loss OY gain of electrons - arrangement lose 3e 2-8 . Al Aluminum 2-8-3 Chlorine Calcium oxygen 17 2-8-7 2o . 2-8-8-2 C 2-6 di ocar 0 gain ie lose ze gain ze 2-8-8 2-8-8 2-8 2 -8 Name of ion Element Ionic charge M3+ Aluminum Chlorine Symbol of ion Al3+ CI- Aluminum ion Chloride ion Calcium ion oxide ion et Con 27 02- Calcium oxygen Cs Scanned with CamScanner