Balance each of the following equations using techniques discussed in class. Mat

Question

Balance each of the following equations using techniques discussed in class. Material as well as charge balance is required. Classify each of the following reactions as either an acid-Base neutralization, single replacement, disproportionation, double replacement, combustion, combination, decomposition or redox. If a particular reaction can be classified in more than one way, show all possibilities. Using standard rules, assign oxidation numbers to each of the atoms in the following compounds: A 1.15 g sample contains a mixture of Cu_2O and CuO. All of the copper in this sample is transformed into 0.809 g of metallic copper. What was the mass of CuO in the original sample. Data: Atomic mass of Cu = 63.55.

Explanation / Answer

2) i) 2B5H9 + 12 O2 ........> 5B2O3 + 9H2O
   ii) Mg3N2 + 4H2SO4 .......> 3MgSO4 + (NH4)2SO4

3) a) Combination reaction
   b) Combustion reaction
   c) acid -base neutralisation
   d) Decomposition reaction
   e) single replcement reaction
4) CaMnO3
   Ca......+2
   Mn .....+4
   O ......-2
.............................

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