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Chapter 4: Q73E (page 226)

Uranium can be isolated from its ores by dissolving it as UO2(NO3)2, then separating it as solid UO2(C2O4). Addition of 0.4031 g of sodium oxalate, NaC2O4, to a solution containing 1.481 g of uranyl nitrate, UO2(NO3)2, yields 1.073 g of solid

\(Na{C_2}{O_4} + U{O_2}{\left( {N{O_3}} \right)_2} + 3{H_2}O \to U{O_2}\left( {{C_2}{O_4}} \right) \cdot 3{H_2}O + 2NaN{O_3}\)

Short Answer

Expert verified

NaC2O4 is the limiting reactant.

The percent yield is 86.6 %.

Step by step solution

01

Balance chemical equation

Balance the chemical equation

02

Determine the molar mass

Find the molar mass.

1 mol =2(22.990) +2(12.011) +4(15.999) =133.998 g.

1mol= 238.029+8(15.999)+2(14.007) = 394.035 g.

1 mol = 238.029+9(15.999) +2(12.011) +6(1.008) = 412.09 g

03

Determine the yield

Find the theoretical yield

\(\begin{aligned}{}3.0083 \times {10^{ - 3}}\,mol\,Na{C_2}{O_4} \times \left( {\frac{{1\,mol\,U{O_2}\left( {{C_2}{O_4}} \right) \cdot 3{H_2}O}}{{1\,mol\,mol\,Na{C_2}{O_4}}}} \right) \times \\\left( {\frac{{412.09\,g\,U{O_2}\left( {{C_2}{O_4}} \right) \cdot 3{H_2}O}}{{1\,mol\,U{O_2}\left( {{C_2}{O_4}} \right) \cdot 3{H_2}O}}} \right)\\ = 1\,.239\,g\,U{O_2}\left( {{C_2}{O_4}} \right) \cdot 3{H_2}O\end{aligned}\)

Find the percent yield of

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Most popular questions from this chapter

A 0.00215g sample of polystyrene, a polymer composed of carbon and hydrogen, produced 0.00726g of CO2 0.00148g of H2O in combustion analysis. What is the empirical formula for polystyrene?

Joseph Priestly prepared oxygen in 1774 by heating red mercury(II) oxide with sunlight focused through a lens. How much heat is required to decompose exactly 1 mole of red HgO(s) to Hg(l) and O2(g) under standard conditions?

Indicate what type or types of reaction each of the following represents:

(a) \(\)\(Ca\left( s \right) + B{r_2}\left( l \right) \to CaB{r_2}\left( s \right)\)

(b) \(Ca{\left( {OH} \right)_2} + 2HBr\left( {aq} \right) \to CaB{r_2}\left( {aq} \right) + 2{H_2}O\left( l \right)\)

(c) \({C_6}{H_{12}}\left( l \right) + 9{O_2}\left( g \right) \to 6C{O_2}\left( g \right) + 6{H_2}O\left( l \right)\)\(\)

A novel process for obtaining magnesium from sea water involves several reactions. Write a balanced chemical equation for each step of the process.

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(e)Finally, the magnesium chloride is melted and electrolyzed to yield liquid magnesium metal and diatomic chlorine gas.

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