Practice Quiz

Praxis II: Chemistry Exam Prep - Question List

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66. Na+(aq) + Cl-(aq) + Ag+(aq) + NO3-(aq) --> AgCl(s) + Na+(aq) + NO3-(aq)

In the equation above, which species are classified as spectator ions?
  1. Na+ alone
  2. NO3- alone
  3. Na+ and NO3-
  4. Ag+ alone
  5. Ag+ and Cl-
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67. Examine the following titration curves. Which of the four represents the titration curve for a strong base and weak acid?
  1. The top left graph
  2. The top right graph
  3. The bottom left graph
  4. The bottom right graph
  5. None of the above
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68. Which of the following acids is classified as weak?
  1. CH3COOH
  2. HCl
  3. HBr
  4. HClO4
  5. H2SO4
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69.
A chemist hypothesizes that a newly developed photodegradable plastic will degrade twice as fast as currently available photodegradable plastics. Which of the following investigations would best test this hypothesis?
  1. Modeling the chemical reactions involved in the degradation of the new plastic and using this model to project degradation rates under different environmental conditions.
  2. Subjecting the new plastic and the existing plastics to the same environmental conditions and measuring their degradation rates.
  3. Comparing the degradation rate of the new plastic with the degradation rates provided by the manufacturers of the existing photodegradable plastics.
  4. Exposing the new photodegradable plastic to conditions of constant UV radiation and no UV radiation and comparing the resulting degradation rates.
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70.
Several unknown solutions have been tested for the presence of Group 1 or Group 2 metals using a flame-test protocol. Which of the following methods would be the best way to represent the collected data?
  1. A table
  2. A histogram
  3. A scatter plot
  4. A line graph
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