1. Balance the following chemical reactions
properly. What principle of conservation is involved?
(a) NaOH + CO2
Na2CO3 + H2O
(b) NH3 + Fe2(SO4)3
(NH4)2 SO4 + Fe(OH)3
(c) Mg(OH)2 + HCL
MgCL2 + H2O
(d) Mg(OH)2 + H2SO4
MgSO4 + H2O
Na2CO3 + H2CO3
(f) Ca3(PO4)2 + H2SO4
2. Crystals of potassium chlorate, KCLO3, will first
melt if heated, and then decompose to give oxygen gas and potassium
(a) Write a balanced equation for the decomposition.
(b) How many moles of potassium chlorate are needed to produce
three moles of oxygen gas?
(c) How many moles of potassium chlorate are needed to give
100 moles of oxygen gas?
(d) How many moles and how many grams of oxygen gas would be
produced by decomposing 100 g of potassium chlorate?