Name one common reagent that can precipitate or react and differentate following pairs: a. Ag^(Theta) and B^(2+)b. Cu^(2+) , Pb^(2+) c. I^(Theta) and CI^(Theta)d. I^(Theta) and Br^(Theta) e. SO_(3)^(2-) and SO_(4)^(2-) i. Fe^(3+) , Cu^(2+) g. Co^(2+) and Cu^(2+)

Name one common reagent that can precipitate or react and differentate

1.	Name one common reagent that can precipitate or react and differentate following pairs: a. Ag^(Theta) and B^(2+)b. Cu^(2+) , Pb^(2+) c. I^(Theta) and CI^(Theta)d. I^(Theta) and Br^(Theta) e. SO_(3)^(2-) and SO_(4)^(2-) i. Fe^(3+) , Cu^(2+) g. Co^(2+) and Cu^(2+)
Answer» SOLUTION :a. `K_(2)Cr_(2)O_(4)` `2Ag^(o+) + CrO_(4)^(2+) rarr underset(Red)(Ag_(2))CrO_(4)darr` `Ba^(2+) + CrO_(4)^(2+) rarrunderset("YELLOW")(BaCrO_(4)darr)` b. `K_(2) CrO` `Cu^(2+) + CrO_(4)^(2-) rarr underset("Chocolate")(CuCrOdarr)` `Pb^(2+) + CrO_(4)^(2+) rarr underset("Yellow")(PbCrO_(4)darr)` c. `AgNO_(3)` `Ag^(o+) + I^(Theta) rarr underset("Yellow")(AgI darr) Ag^(o+) + CI^(Theta) rarr underset("White")(AgCI darr)` d. `CI_(2)` water `+ CHCI_(3)` `21^(Theta) +CI_(2) rarr underset(CHCI_(3)"LAYER")underset(("Violet in"))I_(2)+2CI^(Theta) 2Br^(Theta) +CI_(2) rarr underset(CHCI_(3)layer)underset("Orange in")(Br_(2) +2CI^(Theta))` e.`BaCI_(2)` `BaCI_(2) +SO_(3)^(2-) rarr underset("White ppt. soluble in conc"HCI)(BaSO_(3)darr)` `BaCI_(2) +SO_(4)^(2-) rarr underset("White ppt. insoluble in conc"HCI)(BaSO_(4)darr)` f. `NH_(4)SCN`: `Fe^(3+) +SCN^(Theta) rarr underset("Red colour")([Fe(SCN)]^(2+))` `Cu^(2+) +2SCN^(Theta) rarr underset(Black)(Cu(SCN)_(2)darr)` g. `NH_(4)SCN`: `Co^(2+) +4SCN^(Theta) rarr underset("BLUE colour")([Co(SCN)_(4)]^(2-))` `Cu^(2+) +2SCN^(Theta) rarr underset(Black)(Cu(SCN)_(2)darr)`