Midterm Exam Answer Key.pdf - Name(Last First-4 pts per incorrect answer 1(28 points total Circle the one correct answer for each of the following

Midterm Exam Answer Key.pdf - Name(Last First-4 pts per...

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2 Name (Last, First) _____________________________________ 1.(28 points total) Circle the onecorrect answer for each of the following questions. 1.1) The acronym SDS is commonly used in the laboratory. What does SDS stand for? a)Substance Details Sheet b)Safety Data Sheet c)Substance Details and Specifications d)Safety Disclosures for Substances e)None of the above 1.2)What should be done if a beaker containing 50 mL of 6 M HCl spills in a student’s fume hood? 1.3)Which of the following is the mostelectronegative element? 1.4)Which of the following elements is mostconductive? 1.5)Which of the following compounds has the greatestionic character? a)FeO b)FeS c)CS2d)CO2e)CaO 1.6)In which of the following compounds does phosphorus have the highestoxidation number? 1.7)Which of the following elements has possible oxidation numbers ranging from 4 to + 4? -4 pts per incorrect answer
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3 Name (Last, First) _____________________________________ 2. (12 pts total) If each of the following solutes is dissolved in water to make solutions of similar molarity, predict the relative conductivities of their solutions using the terms high, low, or none. Also, fill in the blanks with the chemical formulas of the species present in solution (excluding water). Solute Relative conductivity of solution (high, low, none) Chemical formula(s) of major species in solution 2.1) Nitrous acid low HNO 2 2.2) Fructose (C 6 H 12 O 6 ) none C 6 H 12 O 6 2.3) Potassium hydrogen phosphate high K + and HPO 4 2 3. (20 pts total) For each of the following, determine if an ion-exchange reaction will occur. If so, write the balanced net ionic equation on the line provided. If ion-exchange does not occur, write NR on the line. 3.1) Copper(II) acetate solution is added to a solution of magnesium bromide Net Ionic Equation:____ NR _____________________________________________________ 3.2) Potassium carbonate solution is added to a solution of lead(II) nitrate Net Ionic Equation: _________ CO 3 2− (aq) + Pb 2+ (aq) PbCO 3 (s) ______________ 3.3) Hydroiodic acid solution is added to a solution of sodium perchlorate Net Ionic Equation:__________________________ NR _____________________________ 3.4) Lithium hydroxide solution is added to a solution of ammonium chloride Net Ionic Equation:____ NH 4 + (aq) + OH (aq) NH 3 (g) + H 2 O (l) ___________________ 3.5) Solid magnesium oxide is added to hydrochloric acid solution Net Ionic Equation:____ 2 H + (aq) + MgO (s) Mg 2+ (aq) + H 2 O (l) ___________________ 4. (12 pts total) Determine whether each of the following is a redox reaction, an ion exchange reaction, or some other type of reaction. Circle the correct reaction type on the right.
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