Sulphuric acid is used in industry to produce phosphoric acid in the reaction that follows.?

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2016-06-16 7:18 pm

Sulphuric acid is used in industry to produce phosphoric acid in the reaction that follows.
H2SO4(aq) + CA3(PO4)2(s) = CaSO4(s) + H3PO4(aq)
The mole ratio of the H2SO4(aq) used to the H2PO4(aq) produced is
A. 1:2
B. 2:3
C. 3:2
D. 2:1

Last question.

When nitroglycerin explodes, large amounts of gases produced very rapidly in the reaction
C3H5N3O9(I) = 12 CO2(g) + 10 H2O(g) + 6 N2(g) + O2(g).
If the 4.0 moles of nitroglycerin explodes, the total number of moles of gaseous products produced is
A. 33
B. 26
C.28
D.29

回答 (1)

fooks

2016-06-16 7:40 pm

1.
The balanced equation : 3H₂SO₄(aq) + Ca₃(PO₄)₂(s) → 3CaSO4(s) + 2H₃PO₄(aq)
According to the equation, mole ratio H₂SO₄ : H₃PO₄ = 3 : 2

...... The answer is : C. 3 : 2

====
The balanced equation : 4C₃H₅N₃O₉(l) → 12CO₂(g) + 10H₂O(g) + 6N₂(g) + O₂(g)
According to the equation,
mole ratio C₃H₅N₃O₉ : (all gaseous products) = 4 : (12 + 10 + 6 + 1) = 4 : 29

Hence, when 4.0 moles of C₃H₅N₃O₉ explodes, 29 moles of gaseous products are produced.

...... The answer is : D. 29

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