Question

Sufuric acid can be prepared starting with the sulfide ore, cuprite (Cu2S). If each sulfur atom...

Sufuric acid can be prepared starting with the sulfide ore, cuprite (Cu2S). If each sulfur atom in Cu2S leads to one molecule of H2SO4, what is the theoretical yield of H2SO4, in kilograms, from 4.67 kg of Cu2S?

Answer: _______ kg H2SO4

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Answer #1

no of moles of Cu2S = weight of Cu2S in grams / molar mass of Cu2S

= 4670 / 159.16

= 0.2934 moles of Cu2S

he has given that from one mole of Cu2S one mole of H2SO4

similarly

0.2934 moles of Cu2S will give 0.2394 moles of H2SO4

formula for theritical yield

= no of moles of product (H2SO4) / no of moles of reactent (Cu2S) x 1000

= 0.2934 / 0.2934 x 1000 = 100% yield

so 0.2934 moles of H2SO4 produced

convert this in to weight

moles = weight in grams / molar mass

weight = 0.2934 x 98.08 = 28.77 grams

= 0.0287 Kg

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