Chm 101 Week 8 Study Question Paper

CHM 101- CHPT 8 Study Questions

1. O-H bond in water is polar because……………

2. In liquids, the strength of the intermolecular interaction is considered ……….

3. In solution, the solvent can be ……………………….

4. A solution is prepared by dissolving 2 g of KCl in 100 g of H2O. In this solution, H2O is the …………………….

5. Oil does not dissolve in water because oil is ………………

6. What is the concentration, in m/v %, of a solution prepared from 50. g NaCl and 2.5 L of water?.

7. In water, a substance that ionizes completely in solution is called a …………… electrolyte

8. An equivalent is ………………………..

9. How many equivalents are present in 5.0 g of Al3+?.

10. An intravenous replacement solution contains
4.0 mEq/L of Ca2+ ions. How many grams of Ca2+ ions are in 3.0 L of the solution?.

11. When some of the sugar added to an iced tea remains undissolved at the bottom of the glass, the solution is referred to as a …………..

12. The solubility of KI is 50 g in 100 g of H2O at 20 oC. If 110 grams of KI are added to 200 g of H2O, how will you describe the solution?.

13. When solutions of KCl and Pd(NO3)2 are mixed, a precipitate forms. Write a balanced equation for the double replacement reaction that occurs.

14. The mass/mass percent concentration refers to ………………………

15. The mass/volume percent concentration refers to …………………….

16. What is the concentration, in m/m %, of solution prepared from 50.0 g of NaCl and 150 g of water?.

17. Rubbing alcohol is 70.% isopropyl alcohol by volume. How many mL of isopropyl alcohol are in a 1 pint (473 mL) container.

18. A patient needs to receive 85 grams of glucose every 12 hours. What volume of a 5.0 % (m/v) glucose solution needs to be administered to the patient each 12 hours?.

19. A(n) ………….. is a type of colloid in which a liquid is dispersed in another liquid or a solid.

20. A homogeneous mixture that does not settle out upon standing is ………………..

21. In the process known as osmosis, ……………… moves through a semi permeable membrane into an area of …………….. concentrations.

22. A solution with the same osmotic pressure as blood is ………………. to the blood.

23. A solution that has an osmotic pressure less than that of red blood cells is called …………………….

24. A red blood cell will undergo crenation in …………………..

25. Which solution is isotonic to a red blood cell?.

26. A red blood cell will undergo hemolysis in ……………………………….

27. The process by which a semipermeable membrane allows water molecules, small molecules and ions to pass through while retaining large particles is called ………………

28. What is the molarity of a solution that contains 17 g of NH3 in 0.50 L of solution?. (N = 14, H = 1).

29. What volume of a 1.5 M KOH solution is needed to provide 3.0 moles of KOH?.

30. According to Henry’s law, the solubility of a gas in a liquid ………………….. ……………………………………………

CHM 101- CHPT 7 Study Questions

1.
According to the kinetic theory of gases, a gas can be compressed much more than a liquid or solid because……………………

2. The force of gas particle against the walls of a container is called ………………

3. A 5.00 L tank contains helium gas at 1.50 atm. What is the pressure of the gas?.

4. The boiling point of water et sea level is 100 oC. At higher altitudes, the boiling point of water will be ………….. than 100 oC.

5. The volume of a gas with a pressure of 1.2 atm increases from 1.0 L to 4.0 L. What is the final pressure of the gas, assuming at constant temperature.

6. Complete the following statement: In Charles’s Law, the volume of a gas …………….. when the ……………… decreases.

7. The volume of a sample of gas, initially at 25 oC increases fro 158 mL to 450 mL. What is the final temperature of the sample of gas, if the pressure in the container is kept constant?.

8. A gas contained in a steel tank has a pressure of 1.5 atm at a temperature of 320 K. What will be the gas pressure when the temperature changes to 450 K?.

9. At 570 mmHg and 25 oC, a gas sample has a volume of 2270 mL. What is the final pressure (in mmHg) at a volume of 1250 mL and a temperature of 175
oC?.

10. At STP, temperature and pressure have the values of …………………..

11. A gas sample contains 4.0 g of CH4 and 2.0 g of He. What is the volume of the sample at STP?.

12. A diver exhales a bubble with the volume of 250 mL at a pressure of 2.5 atm and a temperature of 15 oC. When it reaches the surface where the pressure is 1.0 atm and the temperature is 27 oC?.

13. How many moles of neon occupy a volume 14.3 L at STP?.

14. How many atoms of neon occupy a volume of 14.3 L at STP?.

15. A 1.20 L container contains 1.10 g of an unknown gas at STP. What is the molecular weight of the unknown gas?.

16. A cyclopropane-oxygen mixture is used as an anesthetic. If the partial pressure of the cyclopropane in the mixture is 340 mmHg and the partial pressure of the oxygen is 1.0 atm, what is the total pressure of the mixture in torr.

17. A tank containing helium gas at 490 mmHg, nitrogen gas at 0.75 atm, and neon at 520 torr. What is the total pressure in atm?.

18. A sample containing 4.80 g of O2 gas has a volume of 15.0 L. Pressure and temperature remain constant. What is the new volume of 0.500 mole of O2 is added.

19. What is the number of moles of H2 in 1620 mL of hydrogen gas at STP.

20. What is the volume, in liters, of 4.0 moles of methane gas, CH4, at 18 oC and 1.40 atm?.

21. In a mixture, the partial pressures are argon 415 mmHg, neon 75 mmHg, and nitrogen 125 mmHg. What is the total pressure (atm) exerted by the gas mixture?.

22. A sample of nitrogen (N2) gas has a volume of 250 mL at 30o C and pressure of 745 mmHg. What is the volume of the nitrogen at STP?.