Honors Chemistry
Extra Stoichiometry Problems
1. Silver nitrate reacts with barium chloride to form silver chloride and barium nitrate.
a. Write and balance the chemical equation.
2 AgNO3 + BaCl2 ! 2 AgCl + Ba(NO3)2
b. If 39.02 grams of barium chloride are reacted in an excess of silver nitrate, how many
representative particles (and what type) of silver chloride are produced?
39.02!๐!๐ต๐๐ถ๐!
1!๐ฅ!
1!๐๐๐๐!๐ต๐๐ถ๐!
208.233!๐!๐ต๐๐ถ๐!
!๐ฅ!
2!๐๐๐๐๐ !๐ด๐๐ถ๐
1!๐๐๐๐!๐ต๐๐ถ๐!
!๐ฅ!
6.02!๐ฅ!10!"!๐.๐ข.๐ด๐๐ถ๐
1!๐๐๐๐!๐ด๐๐ถ๐ =2.256!๐ฅ!10!"!๐.๐ข.๐ด๐๐ถ๐
c. If 410.8 grams of barium nitrate are produced how many grams of silver nitrate were
reacted?
410.8!๐!๐ต๐(๐๐!)!
1!๐ฅ!
1!๐๐๐๐!๐ต๐(๐๐!)!
261.335!๐!๐ต๐(๐๐!)!
!๐ฅ!
2!๐๐๐๐๐ !๐ด๐๐๐!
1!๐๐๐๐!๐ต๐(๐๐!)!
!๐ฅ!
169.872!๐!๐ด๐๐๐!
1!๐๐๐๐!๐ด๐๐๐!
=534.1!๐!๐ด๐๐๐!
2. Nitrogen gas is reacted with hydrogen gas to form nitrogen trihydride.
a. Write and balance the chemical equation.
N2(g) + 3 H2(g) ! 2 NH3(g)
b. How many liters of nitrogen trihydride are produced at STP if 80.28 grams of hydrogen
gas are reacted in an excess of nitrogen?
80.28!๐!๐ป!
1!๐ฅ!
1!๐๐๐๐!๐ป!
2.016!๐!๐ป!
!๐ฅ!
2!๐๐๐๐๐ !๐๐ป!
3!๐๐๐๐๐ !๐ป!
!๐ฅ!
22.4!๐ฟ!๐๐ป!
1!๐๐๐๐!๐๐ป!
=594.7!๐ฟ!๐๐ป!
c. How many grams of hydrogen are needed to fully react 621.9 grams of nitrogen gas?
621.9!๐!๐!
1!๐ฅ!
1!๐๐๐๐!๐!
28.014!๐!๐!
!๐ฅ!
3!๐๐๐๐๐ !๐ป!
1!๐๐๐๐!๐!
!๐ฅ!
2.016!๐!๐ป!
1!๐๐๐๐!๐ป!
=134.3!๐!๐ป!
d. How many liters of nitrogen gas are needed to completely react 90.38 L of hydrogen gas
at STP?
90.28!๐ฟ!๐ป!
1!๐ฅ!
1!๐๐๐๐!๐ป!
22.4!๐ฟ!๐ป!
!๐ฅ!
1!๐๐๐๐!๐!
3!๐๐๐๐!๐ป!
!๐ฅ!
22.4!๐ฟ!๐!
1!๐๐๐๐!๐!
=30.09!๐ฟ!๐!!
OR
90.28!๐ฟ!๐ป!
1!๐ฅ!
1!๐ฟ!๐!
3!๐ฟ!๐ป!
=30.09!๐ฟ!๐!
