(Solved) Find the concentration of the Sn2+(aq) in mol/L?

polishprodigy93

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5 years ago

Find the concentration of the Sn2+(aq) in mol/L?

Experimental Design

The potassium dichromate solution is first standardized by titration with a sample of an acidified mol/L solution of the primary standard, iron(II) ammonium sulfate-6-water. The concentration of Cr2O72-(aq) was found to be 0.0085 mol/L. The standardized dichromate solution is then titrated against a 20.00 mL sample of the acidified tin(II) chloride solution.

Evidence

TITRATION OF TIN (II) SOLUTION

(volume of K2Cr2O7(aq) required to react with 20.00 ml of Sn2+(aq))

Trial

1

2

3

4

Final buret reading(ml)

11.8

22.9

33.9

45.0

Initial buret reading (ml)

0.3

11.8

22.9

33.9

Find the concentration of the Sn2+(aq) in mol/L: (give your answer to 4 decimal places)

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bio_man

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5 years ago Edited: 5 years ago, bio_man

Could you confirm the final chemical equation?

I'm getting:

Cr2O72- + 6Fe3+ + 3Sn2+ ⇄ 6Fe2+ + 2Cr3+ + 7H2O + 3Sn4+

I'm doubting that it is right correct, please confirm and get back to me as soon as possible. Remember, if this is incorrect, everything else is wrong too, so it's a major stepping stone, and I don't want to mislead you with the wrong answer

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polishprodigy93 Author

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5 years ago

Yeah I believe that was my equation as well still waiting to see what I get on that. If you could help me with my granary question that would be great!

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Answer accepted by topic starter

bio_man

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Educator

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Find the concentration of the Sn2+(aq) in mol/L?

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