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I understand that failure to submit my written work to payned@atc.edu,  within 5 minutes of submitting this test, will result in a 0 score for any questions that required calculations. To receive full credit, I further understand that I must include any formulas used, replacement of variables with appropriate numerical data, and circled correct final result with appropriate units and number of significant figures. Write your initials in space below to acknowledge your understanding.

What is the hydronium-ion concentration of a 0.30 M solution of HCN ( Ka = 4.9  × 10 –10) at 25°C? Note: Written work required Hint: ICE table required

What is the equilibrium pH of an initially 0.69 M solution of the monoprotic acid benzoic acid at 25°C ( Ka =  )? Note: Written work required Hint: ICE table required

The pH of a solution at 25 °C in which [OH –] = 3.2 × 10 –5 M is _____. ( K w = 1.01 × 10 –14) Note: Written work required

INSTRUCTIONS: The following problems relate to identifying and evaluating inductive and deductive arguments. Select the best answer for each. If the Big Bang theory is correct, then the universe is billions of years old. And if the Big Bang theory is correct, then the universe was not created in six days. Thus, if the universe is billions of years old, then it was not created in six days.

Which of the following is the correct formula for the ionic compound formed between calcium and nitrate?

Noble gases are:

​INSTRUCTIONS: The following selections relate to distinguishing arguments from nonarguments and identifying conclusions. Select the best answer for each.  Lead is toxic, but do you know why? Lead is toxic mainly because it preferentially replaces other metals in biochemical reactions. In so doing it interferes with the proteins that regulate blood pressure (which can cause development delays in children and high blood pressure in adults), heme production (which can lead to anemia), and sperm production. Lead also displaces calcium in the reactions that transmit electrical impulses in the brain, which diminishes the ability to think and recall information. Anne Marie Helmenstine, “Your Guide to Chemistry”

​ Syllogistic Form 1AGiven the following syllogistic form: Some M are not P. No S are M.          Some S are not P. For Syllogistic Form 1A, after filling in the Venn diagram,

​ Categorical Proposition 1AGiven the categorical proposition: “All wiretaps that are approved without a warrant are surveillance techniques that are not legal.” In Categorical Proposition 1A, the subject term is: