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29 Nov 2019

When solutions containing 1.00 g ofBaCl2 and 1.00 g ofNa2SO4 weremixed, solid BaSO4 formed. The BaSO4 precipitate wasfiltered out ofthe solution, allowed to dry, and then weighed. Themass of BaSO4that was isolated from solution was 1.04 g. Use thisinformation toanswer the following questions. Pay close attentionto the properuse and reporting of significant figures andunits.
(a) Write a balancedchemical equation that shows the reactionthatoccurs when an aqueous solution of BaCl2 reacts with anaqueoussolution of Na2SO4 to form aqueous sodium chloride andsolid BaSO4.In your equation, you should indicate the physicalstates of eachreactant and product.
(b) Calculate the moles of BaCl2 that areavailable forreaction.

(c) Calculate the grams ofBaSO4 that should form if allof theavailable BaCl2reacts.
(d) Calculate the moles ofNa2SO4 that are available forreaction.
(e) Calculate the grams ofBaSO4 that should form if allof theavailable Na2SO4reacts.
(f) Which reactant (BaCl2 orNa2SO4) is the limiting reagent in thisreaction?Why?
(g) What is the theoreticalyield of BaSO4?
(h) What is the percent yieldof BaSO4?
(i) If this reaction went tocompletion, then how many grams of theexcess reagent should remainafter the reaction is complete?

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