Active Learning Exercise VI (Review Sheet for midterm II)

  1. For each compound, calculate the number of moles of the compound present in 25.00g.
  2. a. silicon tetrachloride
  1. vanadium(V) oxide
  1. magnesium chloride
  1. Write balanced chemical equations for the following reactions:
  2. The decomposition of potassium chlorate (KClO4) to form potassium chloride and oxygen
  1. The neutralization reaction between calcium hydroxide and hydrochloric acid (hydroxide = OH-)
  1. The single replacement reaction between magnesium and sodium chloride
  1. The combination reaction between aluminum and iodine
  1. Double placement reaction between silver nitrate and calcium chloride
  1. What mass of carbon is required to react with excess bismuth(III) oxide in order to prepare 100.00g of bismuth metal?

Bi2O3 (s) + C (s) Bi (s) + CO (g)

  1. What mass of lead(II) chloride can be prepared by the reaction of 150.0mL of a 0.105M solution of lead(II) nitrate and 200.0mL of a 0.0724M solution of ammonium chloride?
  1. Given the balanced equation:

3 NO2 (g) + H2O (l) 2 HNO3 (aq) + NO (g)

How many grams of HNO3 are produced for every gram of NO2 that reacts?

  1. What mass of iron may be produced by 60.0g of iron(III) oxide and 5.00g of carbon in the reaction:

2 Fe2O3 (s) + 3 C (s) 4 Fe (s) + 3 CO2 (g)?

  1. If the reaction 30.00g of HCl with excess manganese(IV) oxide produce 15.50g of manganese(II) chloride (balanced chemical equation is shown below), what is the %yield?

4 HCl (aq) + MnO2 (s) MnCl2 (s) + 2 H2O (l) + Cl2 (g)

  1. Write the formula of the precipitate formed when solutions of the following compounds are mixed (Write both the molecular equation and the net ionic equation): nickel(II) nitrate and sodium phosphate
  1. Identify what is oxidized and what is reduced in the following balanced reaction:

8 NH3 (g) + 6 NO2 (g) 7 N2 (g) + 12 H2O (g)

  1. Calculate the heat energy involved in each of the following processes.
  2. 100.0g of water at 45.0°C is heated to the boiling point, completely vaporized and the resulting steam heated to 150.0°C.
  1. 75.0g of water at 45.0°C are cooled to the freezing point, frozen solid, and the ice cooled to -90.0°C.
  1. What mass of potassium permanganate would be required to prepare 250.0mL of a 0.05863M solution of potassium permanganate?
  1. If 20.00mL of a 2.350M potassium chromate solution is diluted to a final volume of 250.0mL, what is the concentration of the dilute solution?
  1. 15.84g of copper(II) chloride are dissolved in sufficient water to make 250.0Lof a solution with a density of 1.056g/mL. What is the concentration of this solution in mass % of copper(II) chloride and in molar units (M)?