Chemistry11

PercentPurity&PercentYieldReview!

Name:Date:Block:

1.Considerthereaction:

____Al+____O2à____Al2O3

a. A20.0gsampleofAlreactstoproduce32.7gofAl2O3.Whatisthepercentageyieldofthereaction?

b. Ifthisreactionhasapercentageyieldof74.2%,whatmassofAl2O3canbeproducedwith50.0gofAl?

c. WhatmassofAlisrequiredtomake100.0gofAl2O3ifthereactionhasapercentageyieldof64.7%.2.Considerthereaction:

____KO2+____CO2à____K2CO3+____O2

a. A30.0gsampleofKO2is59.3%pure.WhatmassofK2CO3canthesampleproduce?

b. AnothersampleofKO2withamassof150.0gisreactedsoastoproduce89.7gofK2CO3.WhatisthepercentagepurityofKO2?

c. A15.0gsampleofpureKO2produces7.62gofK2CO3.Whatisthepercentageyieldofthereaction?

d. WhatmassofKO2withapurityof64.8%isneededtomake100.0gofK2CO3?3.Achemistwantstoproduce50.0gofNaClbyreactingsodiumwithchlorinegasaccordingtotheequation:

____Na+____Cl2à____NaCl

Ifthisreactionhasapercentyieldof77.3%,whatmassofsodiummustbereacted?4.Theproductionofsilverfromthereaction,

____AgNO3+____Cuà____Cu(NO3)2+____Ag

hasa74.2%yield.Whatmassofcopperisrequiredtoobtain100.0gofsilver?

1a.86.5%Al1b.70.1gAl2O31c.81.8gAl2a.17.3gK2CO32b.61.5%KO22c.52.2%K2CO32d.159gKO23.25.5gNa4.39.8gCu