What volume of 0.305 M AgNO3 is required to react exactly with 155.0 mL of 0.274 M Na2SO4 solution?

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18-06-2017
Chemistry

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What volume of 0.305 M AgNO3 is required to react exactly with 155.0 mL of 0.274 M Na2SO4 solution?

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amrest amrest · Answer 1 · 2017-06-26T16:28:43+02:00

This reaction formula follows: 2AgNO3 + Na2SO4⇒ Ag2SO4 + 2NaNO3. So the molar ratio between the reactants is AgNO3:Na2SO4 = 2:1. To calculate the moles of NaSO4: 0.274M*0.155 L = 0.04247 mole. According to the above ratio (2:1), the moles of AgNO3 required for a complete reaction is 0.04247 * 2 = 0.08494 mole. Since the concentration of AgNO3 is 0.305M, the volume of AgNO3 is 0.08494mole/0.305M= 0.2785 L = 278.5 mL.