The problem of the lost labels?????!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!

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1295084
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I HONESTLY HAVE NO IDEA WHAT TO DO!!!!!!

My teacher gave us an experiment l and said we have to write a method for it . The experiment sheet says:

In this activity you will need to plan and carry out a sequence of test tube reactions to identify the ions present in a number of solutions. You will interpret your results to solve them.

A gardener has lost the labels of the chemicals. These chemicals are: ammonium chloride, ammonium sulfate, ammonium nitrate, copper (II) sulfate, iron (II) sulfate and sodium bromide.

You are provided the following solutions: Sodium Hydroxide, barium Chloride, Silver nitrate and lead nitrate. use these solutions to help you identify the solutions from the gardener.

I have to plan a sequence of tests, create a table, come up with predictions and observations.

I am so bad at experiments- I have no clue what to do! How do I do this???????????????????????????? ?????????????????????????
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charco
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(Original post by 1295084)
I HONESTLY HAVE NO IDEA WHAT TO DO!!!!!!

My teacher gave us an experiment l and said we have to write a method for it . The experiment sheet says:

In this activity you will need to plan and carry out a sequence of test tube reactions to identify the ions present in a number of solutions. You will interpret your results to solve them.

A gardener has lost the labels of the chemicals. These chemicals are: ammonium chloride, ammonium sulfate, ammonium nitrate, copper (II) sulfate, iron (II) sulfate and sodium bromide.

You are provided the following solutions: Sodium Hydroxide, barium Chloride, Silver nitrate and lead nitrate. use these solutions to help you identify the solutions from the gardener.

I have to plan a sequence of tests, create a table, come up with predictions and observations.

I am so bad at experiments- I have no clue what to do! How do I do this???????????????????????????? ?????????????????????????
The solutions you are given do the following:

Sodium Hydroxide: Forms coloured precipitates with transition metals (Cu(II) =light blue, Fe(II) = green, Fe(III) = brown). White precipitates with main group (p block) metals.
Produces ammonia gas when heated with ammonium salts.

Barium Chloride: Gives a white precipitate with sulfates, sulfites, carbonates

Silver nitrate: Gives a white precipitate with sulfates, chlorides and carbonates
Gives a cream precipitate with bromides
Gives a yellow precipitate with iodides
Gives a light brown precipitate with hydroxides

Lead nitrate: Gives precipitates with sulfates, sulfites, carbonates, hydroxides. Black precipitate with sulfides. Bright yellow precipitate with iodides.

Now come up with a scheme ...
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1295084
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(Original post by charco)
The solutions you are given do the following:

Sodium Hydroxide: Forms coloured precipitates with transition metals (Cu(II) =light blue, Fe(II) = green, Fe(III) = brown). White precipitates with main group (p block) metals.
Produces ammonia gas when heated with ammonium salts.

Barium Chloride: Gives a white precipitate with sulfates, sulfites, carbonates

Silver nitrate: Gives a white precipitate with sulfates, chlorides and carbonates
Gives a cream precipitate with bromides
Gives a yellow precipitate with iodides
Gives a light brown precipitate with hydroxides

Lead nitrate: Gives precipitates with sulfates, sulfites, carbonates, hydroxides. Black precipitate with sulfides. Bright yellow precipitate with iodides.

Now come up with a scheme ...
Thank you: that was EXTREMELY helpful and for my method, would I have to test each solution with each of the given chemicals?

Also, do u know what kind of table I'd have to draw?

(Sorry for the abundance of questions)
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Longshot700
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(Original post by 1295084)
Thank you: that was EXTREMELY helpful
You're welcome.
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charco
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(Original post by 1295084)
Thank you: that was EXTREMELY helpful and for my method, would I have to test each solution with each of the given chemicals?

Also, do u know what kind of table I'd have to draw?

(Sorry for the abundance of questions)
No, the idea is that you CHOOSE a suitable reagent and then go either identifying or eliminating possibilities.

Consider the ions in the solutions that yo are trying to identify and then consider what would happen if one of the reagents were added.

You are trying to find the quickest and most efficient way to identify the unknowns.

For example, if you start with silver nitrate it will give a precipitate with most of the compounds, but not the nitrate ...
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yheamiee
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(Original post by charco)
The solutions you are given do the following:

Sodium Hydroxide: Forms coloured precipitates with transition metals (Cu(II) =light blue, Fe(II) = green, Fe(III) = brown). White precipitates with main group (p block) metals.
Produces ammonia gas when heated with ammonium salts.

Barium Chloride: Gives a white precipitate with sulfates, sulfites, carbonates

Silver nitrate: Gives a white precipitate with sulfates, chlorides and carbonates
Gives a cream precipitate with bromides
Gives a yellow precipitate with iodides
Gives a light brown precipitate with hydroxides

Lead nitrate: Gives precipitates with sulfates, sulfites, carbonates, hydroxides. Black precipitate with sulfides. Bright yellow precipitate with iodides.

Now come up with a scheme ...
Wdym scheme?? Cuz I just got this question and I’m sooo confused 😭😭😭😭
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yheamiee
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(Original post by 1295084)
Thank you: that was EXTREMELY helpful and for my method, would I have to test each solution with each of the given chemicals?

Also, do u know what kind of table I'd have to draw?

(Sorry for the abundance of questions)
Do you remember your answer 😭😭if you do could you type it or like send it 🤷🏾*♀️pleaseee
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