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Assorted General Chemistry Problems

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1. For each of the following situations, identify those for which a reaction is likely to occur. For those that do occur, write a net ionic equation.
a) A solution of lead(ll) nitrate mixed with a solution of sodium chloride:
b) A solution of sodium sulfate mixed with a solution of calcium chloride:
c) A solution of magnesium acetate mixed with a solution of silver nitrate

2. Explain why you would expect a BeCl2 molecule to be linear but an SCl2 molecule to be angular.

3. Use the standard enthalpies of formation to determine the change in enthalpy for the combustion of methane gas (CH4(g)).

4. In the reaction, H3BO3 + IO3-  HIO3 + H2BO3-, calculate whether the products or the reactants are favored at equilibrium.

5. Calculate the voltage of a standard cell with the following oxidation-reduction reaction.
I2 + Cu  2I- + Cu2+

6. Draw and give the IUPAC name for 5 isomers of C4H7Cl

7. Give structural formulas for the following compounds.
a) Ethylmethylamine
b) 3-ethyl-2methylhexanol
c) Butyl ethanoate
d) 3-ethyl-2-hexanone
e) 2,3-dimethylpentanal

8. Balance the following equations by the half-cell method. Show both half-cell reactions and identify them as oxidation or reduction.
a) SO32- + MnO4- + H+  Mn2+ + SO42- + H2O(l)
b) Cl2(g) + OH-  Cl- + ClO3- + H2O(l)
c) SO42- + I- + H+  S2- + I2(s) + H2O(l)

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Assorted General Chemistry Problems regarding redox reactions, precipitates and isomers are solved in detail.

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Assorted General Chemistry Problems

1) List the following gases in order of increasing root-mean-square speed, all at the same temperature: H2, He, O2, Ne

2) Under what conditions of pressure and temperature is a real gas most expected to deviate from ideal gas behaviour?

3) What intermolecular interactions would be the strongest between molecules CH2Cl2?

4) List the following substances in order of increasing boiling point: H2O, H2S, H2Se, H2Te.

5) List the following compounds in order of increasing vapour pressure at 298K: pentane (C5H10), ethanol (C2H5OH), water (H2O)

6) Give one example of a molecular solid.

7) The Henry's Law constant for CO2 is 3.1X10^-2 molL^-1 atm^-1 at 298K. What is the concentration of dissolved CO2 in water exposed to an atmosphere of pure CO2 at 2.0atm? Report your answer to two significant figures.

8) What is the molarity of a solution prepared by dissolving 6.21g of glucose (C6H12O6) in 1.50L of water. Report your answer to the correct number of significant figures.

9) List the following solutions in order of increasing freezing points: 0.1 m NaCl(aq), 0.1 m MgCl2(aq), 0.1 m glucose.

10) Define internal energy and enthalpy. What is the difference between the two?

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