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Chapter 4: Q76E (page 223)

The phosphorus pentoxide used to produce phosphoric acid for cola soft drinks is prepared by burning phosphorus in oxygen.

(a) What is the limiting reactant when 0.200 mol of P4 and 0.200 mol of O2 react according to

P4 + 5O2鉄禤4O10

(b) Calculate the percent yield if 10.0 g of P4O10is isolated from the reaction.

Short Answer

Expert verified

a) Limiting reactant is O2

b) Percent yield will be 88 % of P4O10

Step by step solution

01

Determine limiting reactant

P4 + 5O2 鉄禤4 O10

0.200 0.200

mol mol

1 Mol of P4 gives 1moles of O2. Therefore,

(0.200 mol P4 x 5 mol of O2)/ 1 mol P4

= 1 mol of O2

Here, I have 0.200 mol of O2 but I need 1 mol of O2. Means 0.200 will get used up in the reaction. That鈥檚 why O2 is the limiting reactant.

02

Determine percentage yield

% yield = actual yield x 100

theoretical yield

Actual yield = 10 g ------given

Molar mass of P4O10 = 283.88

Theoretical yield = 0.200 mol O2 x 1 mol P4O10 x 283.88g P4O10

5 mol O2 1 mol P4O10

= 11.355 g P4O10

% yield = actual yield x 100

theoretical yield

\(\begin{aligned}{} &= \frac{{10.0}}{{11.355}} \times 100\\ &= 88\% \,\,{P_4}{O_{10}}\end{aligned}\)

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Most popular questions from this chapter

How many moles of Ca(OH)2 are required to react with 1.36 mol of H3PO4 to produce Ca3(PO4)2 according to the equation \(3Ca{\left( {OH} \right)_2} + 2{H_3}P{O_4} \to C{a_3}{\left( {P{O_4}} \right)_2} + 6{H_2}O\)?

Use the following equations to answer the next four questions:

i.\({H_2}O\left( s \right) \to {H_2}O\left( l \right)\)

ii.\(N{a^ + }\left( {aq} \right) + C{l^ - }\left( {aq} \right) + A{g^ + }\left( {aq} \right) + NO_3^ - \left( {aq} \right) \to AgCl\left( s \right) + N{a^ + }\left( {aq} \right) + NO_3^ - \left( {aq} \right)\)

iii.\(C{H_3}OH\left( g \right) + {O_2}\left( g \right) \to C{O_2}\left( g \right) + {H_2}O\left( g \right)\)

iv. \(2{H_2}O\left( l \right) \to 2{H_2}\left( g \right) + {O_2}\left( g \right)\)

v. \({H^ + }\left( {aq} \right) + O{H^ - }\left( {aq} \right) \to {H_2}O\left( l \right)\)

(a) Which equation describes a physical change?

(b)Which equation identifies the reactants and products of a combustion reaction?

(c)Which equation is not balanced?

(d)Which is a net ionic equation?

Complete and balance the following acid-base equations:

(a)HCl gas reacts with solidCa(OH)2

(b) A solution ofSr(OH)2is added to a solution ofHNO3.

What is the percent yield of a reaction that produces 12.5g of the gas freon CF2Cl2 from 32.9 g of CCl4 and excess HF.

\(CC{l_4} + 2HF \to C{F_2}\)

What is the concentration of NaCl in a solution if titration of 15.00 mL of the solution with 0.2503MAgNO3 requires 20.22 mL of the AgNO3 solution to reach the end point?

AgNO3(aq) + NaCl(aq)鉄禔驳颁濒(s) + NaNO3(aq)
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