Stoichiometry Challenge Problem #1

Sodium metal (113 g) is added to an aqueous solution containing 92 g of HCl in an evacuated, rigid 55 L container. A reaction occurs, and the final temperature is 35°C.

  1. Identify the type of chemical reaction that occurs and predict the products.
  2. Balance the resulting equation, using whole-number coefficients.
  3. Use stoichiometry to identify the limiting reactant. Use the moles of the limiting reactant to calculate the theoretical yield (in moles) of H2 gas produced. (Yes, H2 is one of the products.)
  4. Use the ideal gas law (PV=nRT) to calculate the final pressure (in kPa) in the tank when the reaction is complete. (R = 8.31 L·kPa/mol·K)
  5. Suppose the chlorine atoms are made from radioactive 33Cl, which undergoes beta-minus decay. What effect will the radioactive decay have on the pressure in the tank? Explain.
Last modified: Sunday, 3 June 2012, 1:19 AM