NSC 101 Laboratory for 5/5/98

FINAL EXAM

The final exam will be at 10:30 on Tuesday, May 5. We will have a general help session on Monday, May 4 (time to be announced). Be sure to study over the weekend (between Carnival events) and have questions ready.

  1. Name one of the inert gases. Why are these gases so inert?

  2. Both CO and O2 form with covalent bonds. Which one is the more polar molecule and why?

  3. How many grams of NaF must be dissolved in water to make 1 liter of a .01 M solution?

  4. Give the correct chemical formula for the compounds formed below and give the name of the compound. (And balance the equations for a little extra practice.)

    1. Na + F --->
    2. Mg + Cl --->
    3. NH4 + S --->
    4. Ca + OH - --->
    5. Na + SO42- --->

  5. Balance the following equations with the proper coefficients in front of each compound.

    1. H2 + O2 ---> H2 0
    2. H2 + N2 ---> NH3
    3. Mg(OH)2 + HCl ---> MgCl2 + H2 O

  6. How many grams of Na2 S can be made with 10 gm of Na and 10 gm of S? Will there be any Na or S left over? If so, how much of each?

  7. Water is added to .01 moles of HCl to make a 10 liters of solution. Is this solution acidic or basic? What is the molarity of the solution? What is the pH for the solution?

  8. The acid and base listed below are mixed. Finish the equation by writing the two products of this reaction and balance the equation. Based upon your balanced equation, how many moles of base are needed to neutralize one mole of the acid?

    H2 SO4 + KOH --->