$100 Question from H1 What is the principle type of Solute-solvent interaction for: KBr in water?
$100 Answer from H1 Ion-dipole
$200 Question from H1 When ammonium chloride Dissolves in water, the solution Becomes colder. Is the solution Process exothermic or endothermic?
$200 Answer from H1 endothermic
$300 Question from H1 The enthalpy of solution of KBr In water is +198 kJ/mol. Nevertheless, the solubility of KBr Is relatively high. Why?
$300 Answer from H1 Entropy
$400 Question from H1 Indicate the type of solute-solvent Interaction for methanol in water
$400 Answer from H1 Hydrogen bonding or You could have said dipole-dipole
$500 Question from H1 Rank the solutions from weakest To strongest solute-solvent Interactions (a)KCl in water (b) CH2Cl2 in benzene (c) HCl in acetonitrile
$500 Answer from H1 A > C > B
$100 Question from H2 Water and glycerol CH2(OH)CH(OH)CH2(OH) are miscible in all proportions. What does this Mean? Explain why?
$100 Answer from H2 They mix in all proportions without Forming a precipitate. Reason is due to hydrogen bonding Or strong dipole-dipole interactions
$200 Question from H2 Would you expect steric acid CH3(CH2)16COOH to be more soluble In water or in carbon tetrachloride?
$200 Answer from H2 Carbon tetrachloride Reason is due to weak dipole- Weak dipole interactions
$300 Question from H2 Would you expect alanine (an amino Acid) to be more soluble in water Or in hexane?
$300 Answer from H2 water
$400 Question from H2 Common laboratory solvents include Acetone (CH3COCH3), methanol CH3OH, toluene (C6H5CH3) and Water. Which of these is the best Solvent for non-polar solutes.
$400 Answer from H2 toluene
$500 Question from H2 The solubility of MnSO4 * H2O In water at 20oC is 70 g per 100 mL Of water. Is 1.22 M solution of MnSO4*H2O In water at 20oC, saturated, super-sat Or unsaturated?
$500 Answer from H2 B > A > C
$100 Question from H3 The following equation refers to Which law? Sg = kPg
$100 Answer from H3 Henry’s law
$200 Question from H3 In Raolt’s law, the Xa refers to: (a)Mol fraction of solute (b) Mol fraction of solvent
$200 Answer from H3 B
$300 Question from H3 Molalilty is defined by: (a)Liters of solution (b) Kilograms of solvent (c ) grams of solvent
$300 Answer from H3 B
$400 Question from H3 A freezing point depression can Be calculated using (a)Molality (b) Molarity (c ) grams per liter
$400 Answer from H3 A
$500 Question from H3 Which of the following pair is more Likely to be soluble in hexane C6H14? (a)Benzene C6H6 (b) Glycerol CH(OH)CH(OH)CH2OH
$500 Answer from H3 A: Benzene
$100 Question from H4 How does increasing the Concentration of a non-volatile Solute in water affect the following Properties? (a)Vapor pressure (b) Freezing point
$100 Answer from H4 (a)Decreases (b) Depresses freezing point
$200 Question from H4 Consider two solutions, one formed By adding 10 g of glucose (C6H12O6) To 1 L of water and the other formed By adding 10 g of sucrose (C12H22O11) To 1 L water. Are the vapor pressures Over the two solutions the same?
$200 Answer from H4 No. Would have a different mol Value and therefore a different Molality affecting Fp and Bp.
$300 Question from H4 Why does a 0.10 m aqueous solution Of NaCl have a higher boiling point Than a 0.10 m aqueous solution of C6H12O6?
$300 Answer from H4 NaCl actually has 2 moles of ions Per mole of NaCl
$400 Question from H4 Arrange the following aqueous Solutions, each with 10% by mass of Solute, in order of increasing Bp. (a)Glucose (b) Sucrose (c ) sodium nitrate
$400 Answer from H4 C > A > B
$500 Question from H4 List the following aqueous solutions In order of decreasing Fp. (a)0.040 m glycerin (C3H8O3) (b) m KBr (c ) m phenol (C6H5OH)
$500 Answer from H4 B > A > C
$100 Question from H5 This phenomenon creates shafts of Light in rain forests and in certain Heterogeneous mixtures.
$100 Answer from H5 The Tyndall effect
$200 Question from H5 Which of the following is not a Colloid? (a)Smoke (b) Fog ( c) Kool-Aid drink
$200 Answer from H5 C
$300 Question from H5 Butter is an example of what type Of colloid? (a)Foam (b) Solid foam (c ) solid emulsion (d) aerosol
$300 Answer from H5 Solid emulsion
$400 Question from H5 Name the two type of colloidal Suspensions.
$400 Answer from H5 Hydrophilic and hydrophobic
$500 Question from H5 If absorption means to pass into The interior, adsorption means to___
$500 Answer from H5 Adhere to the surface
Final Jeopardy This author wrote, “If one man kills another, it murder, but if a hundred thousand men kill another hundred thousand, it is considered an act of glory!?”
Final Jeopardy Answer Who is Tolstoy? (The book is Kingdom of God)