[Spring Lady]

Does someone know where can I find instructions for the synthesis of complexes [Cr(H2O)6]3+, [Cr(NH3)6]3+, [Cr(H2O)6]3+ and [Co(NH3)6]3+? Anion in all complexes must be the same.

[BluRay]

Does someone know where can I find instructions for the synthesis of complexes [Cr(H2O)6]3+, [Cr(NH3)6]3+, [Cr(H2O)6]3+ and [Co(NH3)6]3+? Anion in all complexes must be the same.

The first and the third are the same.
You could try to prepare it dissolving Cr(OH)₃ with dilute HCl or dilute H₂SO₄ or dilute HClO4. In the first and second case, some complexes also with Cl^- and with SO₄^2- can form, after a while; in the third case I assume it doesn't form complexes with ClO₄^- but I'm not sure. Anyway, the pH must be  ~ in the interval [2;4].

About [Cr(NH₃)₆]³⁺ you can make it dissolving Cr(OH)₃ with NH₃ in excess, in presence of some NH₄⁺ as buffer.

About [Co(NH₃)₆]³⁺ you can make it from a salt of Co²⁺ with ammonia in excess, letting it oxidise with air: at the beginning it forms the pink [Co(NH₃)₆]²⁺ and then the air oxygen oxidise it at the orange-yellow [Co(NH₃)₆]³⁺.

[Spring Lady]

Thanks.
But, can you give me some instructions about laboratory equipment or procedure? Can I find it on the net?

[BluRay]

Thanks.
But, can you give me some instructions about laboratory equipment or procedure? Can I find it on the net?

Given your initial question, it is assumed you know how to do in practise those things, but if you ask how to do, it means that you have very little knowledge of chemistry. Then it is very difficult to answer you without knowing in detail which are your chemistry's knowledges and skill.

[Spring Lady]

Thanks.
But, can you give me some instructions about laboratory equipment or procedure? Can I find it on the net?

Given your initial question, it is assumed you know how to do in practise those things, but if you ask how to do, it means that you have very little knowledge of chemistry. Then it is very difficult to answer you without knowing in detail which are your chemistry's knowledges and skill.

First, I only go to high school, but working on one project. And it is normal that I don't have a huge knowledge, but my knowledge isn't "very little"! I perhaps don't have a laboratory experience, because this is my first project, but my theoretical knowledge is very good. In chemistry, you can't say "muddle little of this and that, and you get something." So, I can't talk with people who know what it is, if I do not have written and prepared all the regulation. No matter if you both know what it is. Precision is important for research work. 

[BluRay]

Thanks.
But, can you give me some instructions about laboratory equipment or procedure? Can I find it on the net?

Given your initial question, it is assumed you know how to do in practise those things, but if you ask how to do, it means that you have very little knowledge of chemistry. Then it is very difficult to answer you without knowing in detail which are your chemistry's knowledges and skill.

First, I only go to high school, but working on one project. And it is normal that I don't have a huge knowledge, but my knowledge isn't "very little"! I perhaps don't have a laboratory experience, because this is my first project, but my theoretical knowledge is very good. In chemistry, you can't say "muddle little of this and that, and you get something." So, I can't talk with people who know what it is, if I do not have written and prepared all the regulation. No matter if you both know what it is. Precision is important for research work. 

Ok, then you should know how to dissolve a chemical with another, for example.
About Cr(OH)₃  you can prepare it from a Cr³⁺ salt and add a base, so that the pH reach a value in the interval ~ [6;10] then all hydroxide Cr(OH)₃ precipitates and you can filter it out.
About oxidising a solution with air, is enough if you put it in a beaker and mix it with a glass rod or a magnetic stirrer for some time (you see it yourself when it's enough). I don't know what else you should need to know; in case ask.