Solve 9 Unknown Solutions: Lab Challenge

[k-roop]

Ok, so I'm sure many of you have heard of this lab.
The instructor hands out 9 unknown solutions, and it's your goal to label each.
The names have been given to us a day before and we are allowed to research the elements.
The list of elements include:
BaCl2; Cu(NO3)2; CuSO4; HCl; Hg2(NO3)2; KNO3; K2CrO4; AgNO3; and Na2S
So far I've gathered that:
Barium Sulfate will be a thick white precip.
Barium Chromate is yello
Copper (II) Nitrate is blue crystals, when hydrated
Copper (II) Sulfate is a blue power, when hydrated
Potassium Chromate is bright yellow, red cloud with Ag, Brown with Cu, and a yellow precip. will form with Barium.
Also that AgNO3 is colorless
I need help finding ways to mix these to figure out their identities, with as little mixes possible, and only the aqueous solutions are available to us, with watch glasses
THE LAB IS TOMORROW AND I NEED A PRE LAB. Please help.

 

[chemisttree]

Separate out the colored from the non-colored. Which of the above have color? Tenatively label these.

Start adding drops of the colorless ones together. Which one(s) will form a precipitate? What color will it (they) likely be? A smell? Once you have made some tenative identifications of the colorless solutions you are ready to start adding the colored solutions to the colorless ones. Which will form precipitates? What color will they be? Do any of them smell?

 

[Blueshift5]

I would suggest starting by creating a chart or table with the names of the solutions on one side and the known information about the elements on the other side. This will help you make connections and narrow down the possibilities.

Next, you can try mixing small amounts of the solutions together and observing any changes. For example, you can mix a small amount of BaCl2 with HCl and see if a white precipitate forms, which would indicate the presence of barium sulfate.

You can also use chemical reactions to identify some of the solutions. For instance, if you mix Cu(NO3)2 with HCl and a brown gas is produced, it would indicate the presence of copper (II) chloride.

Additionally, you can use a flame test to identify some of the solutions. Each element emits a unique color when heated in a flame, so by observing the color of the flame when each solution is heated, you can determine the presence of certain elements.

Lastly, don't be afraid to ask for help from your instructor or classmates. Collaborating and discussing your findings can help you come to a conclusion more quickly and efficiently.

Remember to record all of your observations and results carefully and accurately. Good luck with your lab tomorrow!