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Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
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ike210 ike210
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11 years ago
Sodium in a plastic bag reacts with sulfuric acid to produce hydrogen gas. The volume of the gas in the bag is 20L. The temperature and pressure are 45°C and 102KPa. Write the balanced chemical equation for the reaction of sodium with the H2SO4.
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wrote...
#1
11 years ago
2 Na + H2SO4 Rightwards Arrow H2 + Na2SO4
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#2
11 years ago
2 Na + H2SO4 -------------------> Na2SO4 + H2.
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#3
11 years ago
20Na + 10H2SO4 ---->10 Na2SO4 +10H2
wrote...
#4
11 years ago
First of all, use the law of ideal gases for the hydrogen gas that was produced.

PV = nRT

102 KPa * 20 L = n * 8.314 L*KPa*K^-1*mol^-1 * (273+45) K
n = 0.77 mol


The chemical equation of the reaction is

2Na + H2SO4  --->  Na2SO4 + H2

Since we have only 0.77 moles of H2 produced, the actual equation is

1.54 Na + 0.77 H2SO4 ---->  0.77 Na2SO4 + 0.77 H2
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