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ID: 717204 • Letter: D
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Document2- Microsoft Word 1 NormalNo Spac Heading 1 Heading Styles Paragraph For the following reaction, 3.19 grams of waterare mxed with excess diphosphorus pentoxids. The reaction yields 9.17 grams of phosphoric acid diphosphorus pentoxide(s) + water() phosphoricacid (aq) What is the theoreticalyield of phosphoric acid ?..rams what is the percent yield for this reaction % For the following reaction, 5.21 grams of sodium chloride are mixed with excess silvernitrate. The reaction yields 11.4 grams of silver chloride. sodium chloride (ag) + silver nitrate (aq) silver chloride (s) +sodium nitrate (aq) What is the theoreticalyield of silver chloride.grams What is the percent yield of silver chloride...-sl CP& (Ctrl)-Explanation / Answer
1)
a)
Molar mass of H2O,
MM = 2*MM(H) + 1*MM(O)
= 2*1.008 + 1*16.0
= 18.016 g/mol
mass of H2O = 3.19 g
mol of H2O = (mass)/(molar mass)
= 3.19/18.02
= 0.1771 mol
Balanced chemical equation is:
3H2O + P2O5 —> 2H3PO4
According to balanced equation
mol of H3PO4 formed = (2/3)* moles of H2O
= (2/3)*0.1771
= 0.118 mol
Molar mass of H3PO4,
MM = 3*MM(H) + 1*MM(P) + 4*MM(O)
= 3*1.008 + 1*30.97 + 4*16.0
= 97.994 g/mol
mass of H3PO4 = number of mol * molar mass
= 0.118*97.99
= 11.57 g
Answer: 11.6 g
b)
% yield = actual mass*100/theoretical mass
= 9.17*100/11.57
= 79.3 %
Answer: 79.3 %
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