Question

1(i). Balance the following equations, and then write the net ionic equation
(a) (NH4)2CO3(aq)   +   Cu(NO3)2(aq) → CuCO3(s)   + NH4NO3(aq)
(b) Mg(OH)2(s)   +   HCl(aq) → MgCl2(aq)   + H2O(l)
(c) BaCO3(s)   +   HBr(aq) → BaBr2(aq)   +   H2O(l)   + CO2(g)
(ii). For each reaction equation, identify the driving force of the reaction
2. What is an electrolyte? How can you experimentally differentiate between a weak electrolyte and a strong electrolyte? Name and give the formulas of a strong electrolyte and a weak electrolyte.
3. 2.516 g of a compound containing carbon, hydrogen and oxygen (CXHYOZ) is subjected to combustion analysis. The results show that 3.082 g of CO2 and 2.705 g of H2O were produced.
   (i). What is the empirical formula for the compound?
   (ii). If the molecular weight of the compound is 160.2 g/mol, what is the molecular formula of the       compound?

Answer 1

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