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Excess Na2SO4 (aq) is added to a 2.53102mL sample of industriai waste containing Ba2+ ions. If 20.5g of BaSO4(s) are precipitated from the reaction, what

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Excess Na2SO4 (aq) is added to a 2.53102mL sample of industriai waste containing Ba2+ ions. If 20.5g of BaSO4(s) are precipitated from the reaction, what was the molar concentration of Ba2+ In the original sample? Ba2+(aq)+Na2SO4(aq)BaSO4(s)+2Na+(aq)

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