Identify the reagent. (and its concentration) that is used to confirm the presen
ID: 518468 • Letter: I
Question
Identify the reagent. (and its concentration) that is used to confirm the presence of each of the following: a. NH_4^+ ______ b. Cu^2+ ______ c. Ca^2+ ________ Refer to Dry Lab 4.D to address the following questions. a. On a flow diagram, .indicates________. b. on a flow diagram, means _______ c. On a flow diagram, means ________Complete the following flow diagram for the Qual I cations. Refer to Dry Lab 4.D, page 411 for a review of the symbolism on a flow diagram. Numbers in parentheses refer to parts of the Experimental Procedure. Qual I. Na^+, K^+, NH_4^+, Mg^2+, Ca^2+", Cu^2+Explanation / Answer
Ans 5 a) Ammonium ions can be confirmed using 6 M NaOH solution
When both the solutions are heated together, the fumes of ammonium ions turn the red litmus paper to blue.
B) 0.5 M of K4Fe(CN)6 is added into the solution to test for copper ions. Red brown precipitate confirms the presence.
C) Aqueous ammonia and ammonium oxalate (NH4)2C2O4 is used to confirm the calcium ions. White precipitate confirms the presence.