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Write the net-ionic equation for the reactions that occur in these anion tests and include states of matter a. Test for CO32- : Add 1 mL 6M HCL. Bubbles indicate CO2. b. Test for SO42- Add BaCl2 A white Barium sulfate solution means that the test is positive for SO42- c. Test for PO43- Balance the following: HPO42-+NH4+ +MoO42-+H+à(NH4)3PO4·12MoO3+H2O Note: no oxidation-reduction occurs. d. Balance using ion-electron method (in acid solution) to solve. Ion testing for=CrO42- Starting rxns: Cr2O72-(aq)àCrO5 (aq) and H2O2 (aq)àH2O (l) e. Testing for SCN- Adding Fe(NO3)3, which will form FeSCN2+ if positive for thiocyanate. The product is aqueous (product of a Lewis acid base-rxn). A complex ion. Soluble. f. g. NO3- testing for Cl- precipitation reaction. Add nitric acid and AgNO3. Curdy white AgCl precipitate means positive for Cl- Must use ion-electron method (in basic solution) to solve. testing for: Reactants= Al, NO3-, OH-, and H2O Products= NH3 and AlO2- starting half reactions: Al(s)àAlO2-(aq) and NO3-(aq)àNH3 (aq)

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