Sodium and Ml

Topics: Sodium, Carbon dioxide, Sodium chloride Pages: 4 (829 words) Published: December 3, 2013
1a. Urea [(NH2)2CO] is produced by reacting ammonia with carbon dioxide with the release of water. In one process 637.2g of ammonia is treated with 1142g of carbon dioxide A. Write a balance equation for the above reaction

B. Which of the 2 reactants is the limiting reagent
C. Calculate the mass of urea formed
D. How much excess reagent is left at the end of the reaction E. If the actual yield of urea formed was 980g what is its yield % a. Ans. 2NH3 + CO2  (NH2)2CO + H2O
(17) (44) (60)
637.21142980
b. HN3
c. 1124g
d. 318g of CO2
e. 87.2%

1b.Iron is reduced from a reaction between aluminium and iron (III) oxide at a temperature of 3000°C. In this reaction 124g of Al and 601g of iron (III) oxide are reacted. A.Write a balance equation for the above reaction

B.Which of the 2 reactants is the limiting reagent?
C.Calculate the mass of aluminium oxide formed
D.How much excess reagent is left at the end of the reaction? E.If the actual yield of ammonium oxide formed was 980g what is its yield %

ANS
a. 2Al + Fe2O3  Al2O3 + 2Fe
(26.98) ( 159.7)(101.96)
124 60180
b. Al
c. 234.3
d. 234
e. 34.1%

1c.A strip of zinc metal with a mass of 2.0g undergoes single displacement reaction with an aqueous solution containing 2.5g of silver(I) nitrate A.Write a balance equation for the above reaction

B.Which of the 2 reactants is the limiting reagent?
C.Calculate the mass of zinc (II) nitrate formed
D.How much excess reagent is left at the end of the reaction? E.If the actual yield of zinc (i) nitrate1.20g formed what is its yield %

Ans:
a. Zn + 2AgNO3  2Ag + Zn (NO3)2
(65.4)(169.9)(127.4)
2.02.51.2

b. Ag NO3
c. 1.59g
d. 1.52g
e. 75.5%

2.Complete the equation by predicting the product and indicate the type of reaction for the following:

ai)____ Na + ____ FeBr3  ii)____ NaOH + ____ H2SO4 

3 Na + 1 FeBr3  3 NaBr + 1 Fe2 NaOH + 1 H2SO4  1 Na2SO4 +...
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