stoichiometry problems.notebook
October 29, 2009
• One way of producing O2(g) involves the decomposition of potassium
chlorate into potassium chloride and oxygen gas. A 25.5 g sample of
Potassium chlorate is decomposed. How many moles of O2(g) are
produced?
• How many grams of potassium chloride?
• How many grams of oxygen?
Oct 26­10:52 AM
1
stoichiometry problems.notebook
October 29, 2009
• A piece of aluminum foil 5.11 in x 3.23 in x 0.0381 in is dissolved in
excess HCl(aq). How many grams of H2(g) are produced?
Oct 26­10:53 AM
2
stoichiometry problems.notebook
October 29, 2009
• How many grams of each reactant are needed to produce 15 grams
of iron form the following reaction?
• Fe2O3(s) + Al(s) → Fe(s) + Al2O3(s)
Oct 26­11:11 AM
3
stoichiometry problems.notebook
October 29, 2009
• K2PtCl4(aq) + NH3(aq) → Pt(NH3)2Cl2 (s)+ KCl(aq)
• What mass of Pt(NH3)2Cl2 can be produced from 65 g of K2PtCl4 ?
• How much KCl will be produced?
• How much from 65 grams of NH3?
Oct 26­10:55 AM
4
stoichiometry problems.notebook
October 29, 2009
Zinc metal will react with either hydrochloric acid or sulfuric acid to produce hydrogen gas. If 50.0 g of zinc are to be used in the reaction, how much of each acid would be needed to completely react with all of the zinc? How much hydrogen gas (in grams) would be produced in each case?
Oct 26­1:13 PM
5