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Chemistry
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13 Dec 2019

1) How could you separate barium sulfate, BaSO4, from(NH4)2CO3?

2) How could you separate zinc chloride, ZnCl2, from zincsulfide, ZnS?

3) How could you separate tellurium dioxide, TeO2, fromSiO2?

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Related questions

How could you separate zinc chloride from silicon dioxide?

1. In general, what kind of aqueous reagent could you use todissolve a mixture of solid FeCO3.

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2. How could you separate the cations in solution of Ca(NO3)2 andBa(NO3)2?

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3. Could you separate Ba2+ from Ca2+ by means of:
a) (NH4)2CO3? Why?
b) K2CrO4? Why?
c) (NH4)2SO4? Why?

1) Approximately how many mL of 5% BaCl2รขยˆย™2H2O solution would be required to precipitate all the sulfate if we assume that your samples are pure sodium sulfate? Assume that the density of the barium chloride solution is 1.00 g/mL, and that you should be using 50% excess precipitant.

2) If the samples were pure potassium sulfate would you require a smaller or larger volume of barium chloride solution than the amount calculated in 1. above? Why?

3) If ordinary filter paper, instead of ashless paper were used, how would your experimental results be affected? Would they be too high or too low?

4) Why are the washes of the barium sulfate tested with AgNO3?

5) Does the solubility of BaSO4 increase significantly as the temperature of the solution is increased? (Look up the Ksp at different temperatures and calculate the solubility).

6) What are some errors in this procedure that could affect the final amount of precipitate.

7) From your answer to question 6 above, would you say that the procedure for the sulfate analysis is likely to give results that are too high or too low?

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