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The unknown is colorless, odorless, and neutral. When mixed with NaOH it produced a brown precipitate and when mixed with BaCl2 it produced a white precipitate. Reactions with other halides gave yellow precipitates. What unknown is it? Write the exchange reaction with the unknown and NaOH. Write the balanced reaction between the unknown and BaCl2. Specify the states in all reactions.

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Related questions

There are 10 unknown ID's. What compound are the Unknowns?

Clues:

1. Copper sulfate solutions are blue.

2. Acids react with sodium sulfide and release gas. Hydrogen sulfide smells like rotten eggs.

3. When a base is mixed with NH4Cl it will smell like ammonia (NH3).

4. Ammonia vapor will turn litimus paper blue when it is damp.

5. When silver nitrate is combined with compounds containing halogens (Br,Cl,I), white or yellow precipitates form.

6. BaCl2 reacts with H2 SO4 and CuSO4 and forks a white precipitate BaSO4.

7. When CuSO4 is mixed with KI it gives orange-yellow precipitate. No precipitate with NaBr.

8. When excess NaOH is added to BaCl2 white cloudy precipitate ((Ba(OH)) is formed.

9. HCl and AgNO3 react and produce AgCl( white precipitate).

10. AgCl forms white precipitate AgBr forms creamy or light yellow precipitate.

pH tests:

1. A. pH color is no change 4-6

2. B. pH color is blue 10-12

3. C. pH color is no change 4-6

4. D. pH color is red 1-2

5. E. pH color is no change 4-6

6. F. pH color is no change 4-6

7. G. pH color is red 2

8. H. pH color is no change 5

9. I. pH color is dark/ black 12

10. J. pH color is no change 3

When combined:

1. A+B=no rxn A+C=no rxn A+D=no rxn A+E=no rxn A+F=no rxn A+G=no rxn A+H=white, opaque A+I=no rxn A+J=yellow

2. B+C=no rxn B+D=white, precipitate formed B+E=white, cloudy B+F=no rxn B+G=no rxn, precipitate formed B+H=brown B+I=no rxn B+J=dark brown

3. C+D=no rxn C+E= no rxn C+F=no rxn C+G=no rxn C+H=white, cloudy opaque C+I=no rxn C+J=light blue

4. D+E=white, cloudy D+F=no rxn D+G=no rxn D+H=no rxn D+I=no rxn D+J=no rxn

5. E+F=no rxn E+G=no rxn E+H=white, cloudy similar to C+H E+I=no rxn, slight precipitate E+J=white

6. F+G=no rxn F+H=white, cloudy F+I=no rxn F+J=no rxn

7. G+H=white, cloudy G+I=no rxn G+J=no rxn

8. H+I=light brown H+J=no rxn

The Unknowns are AgNO3, BaCl2, CuSO4, HCl, H2SO4, KI, NaBr, NaOH, Na2S, NH4S

What is solution, explanation, and net ionic equation for the unknowns: A,B,C,D,E,F,G,H,I,J

Please match the compound with the unknown (letters a-j)

1. Classification of reactionperformed and observed results:

A) reaction of dissolved unknown with BaCl2 (aq): white precipitate forms.

B) reaction of dissolved unknown with H2SO4 (aq): a strong -smelling , coloerless gas bubbles

C) reaction of dissolved unknown with AgNO3 (aq) : no reaction.

2. Confirmatory reactions performed and observed results:

Based on the information from part (1) above, which anions (of those on the list of possible ones) might be in Unknown A?

Based on the information from part (1) above, which anions (of those on the list of possible) are not in Unknown A ?

Describ the confirmatory test that should be done next. Explain how you would know which one is anion is in Unknown A.

3. Write equation for the reaction that would have happened in the lab that allowed identification of the anion in Unknown A.

1. An unknown solution gave a strong yellow flame test. The solution gave no reaction with ammonium carbonate, ammonium phosphate, or ammonium sulfate. The halide test produced a yellow-orange color in the hexane layer. What is the alkali or alkaline earth element, and the halide in the unknown solution? 2. An unkown solution gave a bright red flame test. The solution produced a white precipitate with Ammonium carbonate, ammonium phosphate, and ammonium sulfate. The halide test produced a purple color in the hexane layer. What is the alkali or alkaline earth metal element, and the halide in the unknown solution?

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