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Aqueous sulfuric acid H2SO4 reacts with solid sodium hydroxide NaOH to produce aqueous sodium sulfate Na2SO4...

Aqueous sulfuric acid H2SO4 reacts with solid sodium hydroxide NaOH to produce aqueous sodium sulfate Na2SO4 and liquid water H2O. If 6.41gof sodium sulfate is produced from the reaction of 7.8g of sulfuric acid and 4.4g of sodium hydroxide, calculate the percent yield of sodium sulfate.

Be sure your answer has the correct number of significant digits in it.

Solutions

Expert Solution

Reaction between H2SO4 and NaOH

H2SO4 + 2NaOH Na2SO4 + 2H2O

molar mass of H2SO4 = 98.079 gm/mol that mean 1 mole of H2SO4 = 98.079 gm

molar mass of NaOH = 39.997 gm/mol that mean 2 mole of NaOH = 79.994 gm

According to reaction 1 mole of H2SO4 react with 2 mole of NaOH that mean 98.079 gm of H2SO4 react with 79.994 gm of NaOH then 7.8 gm of H2SO4 require 7.8 79.994/98.079 = 6.36 gm of NaOH

but NaOH given only 4.4 gm thus NaOH is limiting reactant react completly.

molar mass of Na2SO4 = 142.04 gm/mol that mean 1 mole of Na2SO4 = 142.04 gm

According to reaction 2 mole of NaOH produce 1 mole of Na2SO4 that mean 79.994 gm of NaOH produce 142.04 gm of Na2SO4 then 4.4 gm of NaOH produce 4.4 142.04/79.994 = 7.8127859 gm of Na2SO4

7.8127859 gm is therotical yield

7.8127859 gm = 100% then 7.8 gm = 7.8 100/ 7.8127859 = 99.8363 %

percent yield = 99.8363%


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