-
NotesSolutions Review Book Question AnswersAssigned as HW on 3/28/19: Review Book p. 120 # 1-121. 4.2. 2.3. 3. Potassium chloride, KCl dissociates and dissolves in water therefore both K+ and Cl- act as the solute dissolving in the water solvent.4. 4. Anything that is aqueous means its been dissolved in water and is ALWAYS a homogeneous mixture.5. 4. Water (H2O) is a bent molecule with asymmetrical charge distribution making it polar. Polar substances dissolve polar and ionic substances because like polarities are soluble (like dissolves like)6. 3. All components of a solution pass through a filter paper and cone because the solvent has fully dissolved the solute.7. 2. Metallic substances do not dissolve, ionic substances will only dissolve in polar solvents and color has no impact on dissolving. Covalent substances are the only substances that can be nonpolar.8. 1. As temperature increases, gas molecules move more rapidly and escape from solution, becoming less soluble.9. 1. Pressure only affects gases in solution.10. 1. The partial positive hydrogen ends of a water molecule attract to the positive sodium ion while the partial negative end of the water molecule attracts to the negative chloride ion.11. 2. Opposite charges attract.12. 3. For a gas to be most soluble and remain dissolved in a solvent it needs high pressure and low temperatures. The high pressure forces the gas into solution and the low temperature restricts gas molecule motion.Magic Sand-Polarity Activity and Answer Key Assigned as CW on 3/29/19 and 4/1/19Table G MC WS and Answer Key Assigned as HW on 4/1/19Table G Practice and Answer Key.pdf Assigned as CW on 4/2/19Molarity Concentration Activity Assigned as CW on 4/4/19 and 4/5/19Introduction to Solutions WS Answer Key Assigned as a Do Now on 4/8/19 and 4/9/19Molarity Concentration MC WS Assigned as HW on 4/8/19Molarity and PPM Concentrations practice Assigned as HW on 4/9/19Colligative Properties MC WS Assigned as CW on 4/11/19Solutions Unit Review Packet 2019 Distributed on 4/11/19___________________________________________________________________________________________________________OLD MATERIALSR Chem Table G Worksheets Answer keys Assigned as HW on 4/12/18
Table F and Table G Practice Answer Keys.pdf Assigned as CW on 4/13/18
R Chem Solutions Molarity Activity Answer Key Assigned as CW on 4/16/18-4/17/18
R Book p 128 Q# 24-29 Molarity Conc. Answer Key Assigned as HW on 4/16/18
Solutions Packet Questions Answer Key Assigned as HW on 4/17/18
R Chem Colligative Properties HW Sheet 1 & R Chem R Book Colligative Prop Answer Key Assigned as HW on 4/18/18
__________________________________________________________________________________________________________________________Extra Review MaterialsOLD MATERIALS___________________________________________________________________________________________________________Solutions Unit Worksheets and Answer KeysExtra Review Materials________________________________________________________________________________________________________OLD MATERIALSSolutions Worksheet Answer KeysPolar Nature of Substances Answer Key Classwork activity on 3/21/16 and 3/22/16Introduction to Solutions Questions Answer Key Classwork on 3/22/16Set 1- Solubility Guidelines for Aqueous Solutions Answer Key Classwork on 3/23/16
__________________________________________________________________________________________________________Solutions Review Book Question AnswersHW 3/28/16: Review Book p. 120 # 1-12and p. 123 #13-231. 4.2. 2.3. 3. Potassium chloride, KCl dissociates and dissolves in water therefore both K+ and Cl- act as the solute dissolving in the water solvent.4. 4. Anything that is aqueous means its been dissolved in water and is ALWAYS a homogeneous mixture.5. 4. Water (H2O) is a bent molecule with asymmetrical charge distribution making it polar. Polar substances dissolve polar and ionic substances because like polarities are soluble (like dissolves like)6. 3. All components of a solution pass through a filter paper and cone because the solvent has fully dissolved the solute.7. 2. Metallic substances do not dissolve, ionic substances will only dissolve in polar solvents and color has no impact on dissolving. Covalent substances are the only substances that can be nonpolar.8. 1. As temperature increases, gas molecules move more rapidly and escape from solution, becoming less soluble.9. 1. Pressure only affects gases in solution.10. 1. The partial positive hydrogen ends of a water molecule attract to the positive sodium ion while the partial negative end of the water molecule attracts to the negative chloride ion.11. 2. Opposite charges attract.12. 3. For a gas to be most soluble and remain dissolved in a solvent it needs high pressure and low temperatures. The high pressure forces the gas into solution and the low temperature restricts gas molecule motion.13. 2. Use Table G. The solubility of a gas will decrease as temperature increases because the particles have more KE and escape the solvent more easily.14. 4. The solubility of a solid solute in solution increases as temperature increases.15. 3. According to Table G, 39 g of KCl must be dissolved in 100 g of water to make a saturated solution. An additional 25 g must be added to the 14 g of solute already dissolved.16. 1. Table G17. 1. The lowest amount of solute dissolves for this salt at 50°C when compared to the other salts.18. 4. The solubility of KNO3 increases as temperature increases according to Table G. Trial 4 should be higher than 70 g not lower.19. 4. According to table G, 45 g of KCl dissolves in 100 g of water to make a saturated solution at 60°C, therefore 90 g will dissolve in 200 g of water.20. 3. Barium sulfate (BaSO4) is insoluble because Ba+2 is an exception to sulfate forming soluble compounds.21. 2. Lead (II) iodide (PbCl2) is insoluble because any halide when paired with a Pb+2 ion will be insoluble.22. 1. All compounds present, both the reactants and products after the double replacement reaction are soluble in water because of the presence of a group 1 ion. All ions are present in solution because everything is soluble in water. (Na2CrO4 + K2CO3 --> K2CrO4 + Na2CO3)23. 2. 40 g of KNO3 at 25°C produces a saturated solution. The solute amount is on the solubility curve for KNO3 at this temperature)______________________________________________________________________________________________________________HW 3/29/16: Review Book p. 132-134 # 1-20, 31, 36, 371. 2.2. 1.3. 2.4. 2. Substances with covalent bonding can be nonpolar. Ionic substances are NEVER nonpolar because oppositely charged ions are present. Metallic substances will not dissolve in solvents. Their free moving electrons makes them constantly polar.5. 2.6. 3. The more particles dissolved in a water, the higher the BP and the lower the FP will be.7. 1. Table G8. 2. Supersaturated solutions are unstable and any disturbance will cause the entire solute to crystallize.9. 3. Gases are most soluble at high pressure because it forces the molecules into solution and low temperatures because the molecules move less and less likely to escape the solvent.10. 2. Lower temperatures means less molecule movement so the molecules stay in solution more readily (higher solubility)11. 1. Lower temperature means less molecular motion and less ability for a liquid to escape as a gas to create vapor pressure.12. 1. BP elevation and FP depression with the addition of solute to water.13. 2. Table G.14. 4.15. 3.16. 3.17. 3.18. 3.19. 2.20. 3.31. Answer= 285.46 g. 74.54 grams dissolved in 1000 g (1 L) of water is unsaturated. According to Table G, 36 g saturated 100 g of water, so 360 grams are needed to saturate 1000 g of water. To be saturated an additional 285.46 g of solute must be added to the 1000 g of water.36. The solution the scientist made is unsaturated (44 g of HCl in 200 g of water). According to Table G, 72 g saturates 100 g of water so 144 g of HCl are needed to saturate 200 g of water.37. The particles are evenly distributed in the solution making it a homogeneous mixture.__________________________________________________________________________________________________________HW on 4/8/16 Review Book p. 129 #38-43, p. 133 #23, 2938. 1. NaCl contains an ionic bond and the presence of solute in solution lowers freezing point and increases boiling point.39. 3. Salt dissociates in solution so the number of ions increases and any particles lower the freezing point and increase the boiling point of a substance.40. 4. NaOH is the only substance that dissociates into ions and will yield twice the amount of particles as the other substances resulting in the lowest freezing point. The more particles in solution, the lower the freezing point.41. 2.42. 4. This solution has the higher of the two concentrations and yields more ions in solution.43. 1. CH3OH is an organic alcohol with covalent bonds and will not dissociate in solution therefore it WILL NOT CONDUCT because no mobile ions are present.23. 1.29. Solution C. It yields the most ions in solution. B and D will not dissociate and A only dissociates into 2 ions while Ba(OH)2 yields 3 ions in solution.____________________________________________________________________________________________________________
Select a School...
