Practice Quiz

IB Chemistry Test Prep - Question List

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6. Find the pH of the a 0.500M solution of the weak base Ammonia (NH3). The Kb = 1.78*10-5

NH3 +H2O --> NH4+ + OH-
  1. 13.01
  2. 9.13
  3. 10.52
  4. 11.48
  5. 12.37
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7. What property of a metal refers to its ability to be hammered into sheets?
  1. Ductility
  2. Thermal conductivity
  3. Electrical conductivity
  4. Malleability
  5. Density
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8. You are dissolving a gas in water. If the partial pressure of the gas is 1 atm, and the concentration is .5g per 50mL of solution, then what is the concentration of gas at 800mmHg? How many grams of gas are dissolved in the water now?
  1. 0.66g dissolved at a concentration of 0.013 g/mL
  2. 0.66 g dissolved at a concentration of 0.02 g/mL
  3. 0.5 g dissolved at a concentration of 0.013 g/mL
  4. 0.5 g dissolved at a concentration of 0.02 g/mL
  5. 1.0 g dissolved at a concentration of 0.02 g/mL
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9. Which of the following is the correct molecular formula for magnesium phosphate?
  1. MgPO4
  2. Mg3(PO4)2
  3. Mg(PO4)2
  4. MgP
  5. MgP2
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10. Which of the following elements is most easily reduced?
  1. Chlorine
  2. Phosphorous
  3. Sodium
  4. Potassium
  5. Lithium
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