CHEM 1364

Test 2

Fall 1999

SHORT ANSWER: 2 points each. Fill in the blank with the most correct answer.

1. _______________________ is defined as moles of solute per liter of solution.

2. __________________ is the process of adding more solvent to a solution.

3. A(n) ____________________ is a species that will not conduct electricity when dissolved in water.

4. ____________________ is the name of the process when an acid reacts with a base.

5. A(n) _______________________ is formed when solutions containing ions that form an insoluble species are mixed.

6. _______________________ is the process of adding an accurately-determined volume of solution to an unknown to determine the amount of the unknown.

7. Jumpin' Jack Flash is a _____________, and that was the subject of Chapter 10.

8. Pressure is _____________ per unit _____________.

9. A(n) ____________________ is a device that is used to measure pressure.

10. ____________________ Law relates pressure and volume.

11. _______________________, the coldest temperature possible, was discovered because of the study of the behavior of gases as the temperature is changed.

12. The _______________ Gas Equation relates the four parameters that can completely define a gas.

13. The _____________________ pressure that a gas in a mixture of gases would exert in the absence of all other gases in the mixture.

14. The _____________________________ Theory consists of five postulates that are used to describe the behavior of gases.

15. The ________________________ Equation includes terms to adjust for molecular volume and the intermolecular forces that a real gas would have.

PROBLEMS (15 points each). Show your work and circle your answers where appropriate for full credit.

16. Predict whether the following reactions will occur. If a reaction does occur, write the products and the net ionic equation for the reaction. If it does not occur, explain why there is no reaction.

AgNO3 + HCl

K2SO4 + FeBr3

Pb(NO3)2 + Cu

Zn + AgCl

17. A chemist attempting to determine the amount of HCl in a solution reacted the acid with 0.2474 grams of Na2CO3. She found this reaction required 38.11 mL of the HCl solution to reach the equivalence point. What is the molarity of the HCl solution?

2HCl + Na2CO3 CO2 + H2O + 2NaCl

18. 1.20 x 105 kPa of helium is contained in a 1.00 x 102 L container at 21OC. What will the volume of this gas be at STP?

19. Hydrogen fluoride (HF) is known to combine with itself in the gas phase. What is the formula of HF in the gas phase if 4.36 g of the gas occupied a volume of 2.50 L at 0.711 atm and 25OC.

20. Using the van der Walls equation, calculate the pressure that CCl4 will exert at 40OC if 1.00 mol occupies 28.0 L. (For CCl4, a = 20.4 and b = 0.1383)

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