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Assorted questions in General Chemistry

Question #1

When HNO3 is added to HCN(aq), the CN^- concentration is:

(a) increased (b) decreased (c) not changed

Question # 2

For each of the following processes, state whether nuclear fission, nuclear fusion, or neither fission nor fusion is occurring:
(a) production of energy in the interior of the sun
(b) burning of gasoline
(c) explosion of the atomic bomb at Hiroshima in 1945
(d) production of electricity at the Indian point nuclear power plant

Question #3
State whether the statements are true or false.
1. If a process is reversible, there is no change in the entropy of the universe.
2. Samples of the same polymer may have different average molecular weights.
3. The half-life of a reagent is the amount of time required for the concentration of that reagent to drop to ½ its original value.
4. For a system at equilibrium, the reaction quotient equals the equilibrium constant.
5. An Arrhenius base generates an excess of OH− ions in solution.
6. A buffer solution is formed by adding a large excess of acid to a solution containing its conjugate base.
7. When a weak acid is titrated against a strong base, the equivalence point occurs at a pH greater than 7.

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Solution Preview

Q1. When HNO3 is added, we are adding a common ion H+ to the HCN equilibrium HCN ---> H+ + CN- As product is being ...

Solution Summary

A number of true/false questions in kinetics and acids and bases are answered.