I know I posted this and it got a response, but unfortunately for me the reponse has got me confused, sorry Bob.

Fe3+ (aq), Ca2+ (aq) and Ba2+ are all present in the same solution. Fully describe a procedure whereby you could separate these ions from one another

Rather than qoing through another (or the same) separation procedure, why don't you copy the response you received and tell us what you didn't understand about it. Tell us what is confusing you about the response you received.

To separate Fe3+ (aq), Ca2+ (aq), and Ba2+ ions from each other in a solution, you can use precipitation reactions based on the solubility of their respective salts. Here's a step-by-step procedure:

1. Start by adding a small amount of HCl (hydrochloric acid) to the solution. This will convert any carbonates present to their respective chlorides.

2. Next, add NaOH (sodium hydroxide) solution drop by drop to the solution. This will cause the formation of a brown precipitate of Fe(OH)3. Stir the mixture thoroughly to ensure complete precipitation.

3. Filter the mixture to separate the precipitate from the remaining solution. The precipitate obtained contains Fe3+ ions. Set it aside.

4. To the filtrate obtained in step 3, add a few drops of Na2SO4 (sodium sulfate). This will cause the formation of a white precipitate of BaSO4.

5. Stir the mixture thoroughly and again filter to separate the white precipitate (BaSO4) from the remaining solution. The precipitate obtained contains Ba2+ ions. Set it aside.

6. The filtrate obtained in step 5 contains Ca2+ ions. To confirm the presence of Ca2+ ions, you can perform a confirmatory test using ammonium oxalate solution. Add a few drops of ammonium oxalate to the filtrate. If a white precipitate of CaC2O4 (calcium oxalate) forms, it confirms the presence of Ca2+ ions.

By following this procedure, you can effectively separate Fe3+ (aq), Ca2+ (aq), and Ba2+ ions from each other in the same solution.