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A 3.455-g sample of a mixture was analyzed for barium ion by adding a small excess of sulfuric acid to an aqueous solution of the sample. The resultant reaction produced a precipitate of barium sulfate, which was collected by filtration, washed, dried, and weighed. If 0.2815 g of barium sulfate was obtained, what was the mass percentage of barium in the sample?

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Tod Thiel
Tod ThielLv2
13 May 2020

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Related questions

A chemist added an excess of sodium sulfate to a solution of soluble barium compound to precipitate all of the barium ion as barium sulfate, BaSO4. How many grams of barium ion are in a 454mg sample of the barium compound if a solution of the sample gave 513 mg BaSO4 precipitate? What is the mass percentage of barium compound?

Conversing factor please!

You want to determine the percent of sulfate in an unknown sample of a hydrated metal sulfate with the formula My(SO4)xร‚ยทnH2O. You dissolve 0.2888 g of your unknown in DI water and heat to near boiling. You react the dissolved unknown with a hot barium chloride solution and you collect the barium sulfate you make via gravity filtration. The filter paper weighed 0.597 g after a piece was torn off. The dry barium sulfate crystal and the filter paper weighed 0.910 g. Answer the following:

1. What is the molar mass of barium sulfate?

2. What is the molar mass of sulfate?

3. How many moles of sulfate were produced?

4. How many grams of sulfate were produced?

5. What is the percent sulfate?

I know the answer for the first two but im unsure of the next couple of questions. Thank you in advnadce :)

You are given a solid that is a mixture of sodium sulfate andpotassium sulfate. a o.205g sample of the mixture is dissolved inwater. An excess of an aqueous solution of barium chloride isadded. the barium sulfate tat is formed is filtered, dried, andweighed. its mass is 0.298g. what mass of sulfate ion is in thesample? What is the mass percent of sulfate ion in the sample? whatare the percent compositions by mass of sodium sulfate andpotassium sulfate in the sample?

I know this question was answered already in the text book sectionbut the answer isn't corresponding to my answer given in the backof the book (possibly because i am using a different version of thetext book so the question may have been slightly different): 0.123gsulfate ion, 60% sulfate ion, 61% potassium sulfate and 39% sodiumsulfate

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