How many grams of NaC₂H₃O₂ should be dissolved in 400.0 g of water to prepare a solution that is 11.28% NaC₂H₃O₂ by mass?

Question

Quizplus · Accepted Answer

To find the mass of NaC₂H₃O₂ needed, use the formula: (mass of solute / (mass of solute + mass of solvent)) * 100 = % by mass. Let x be the mass of NaC₂H₃O₂. Then, (x / (x + 400)) * 100 = 11.28. Solving for x gives approximately 50.86 g.

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How Many Grams of NaC₂H₃O₂ Should Be Dissolved in 400