Question

Part A
1) Chlorine dioxide reacts in basic water to form chlorite and chlorate according to the following chemical equation:
     2ClO₂(aq) + 2OH^–(aq) → ClO₂^–(aq) + ClO₃^–(aq) + H₂O(l)
     Under a certain set of conditions, the initial rate of disappearance of chlorine dioxide was determined to be 2.30 x 10^–1 M/s. What is the initial rate of appearance of chlorite ion under those same
     conditions?
   a) 9.20 x 10^–1 M/s
   b) 1.15 x 10^–1 M/s
   c) 5.75 x 10^–2 M/s
d) 2.30 x 10^-1 M/s
   e) 4.60 x 10^–1 M/s
2) What is the freezing point of a solution prepared from 50.0 g ethylene glycol (C₂H₆O₂) and 85.0 g H₂O? K_f of water is 1.86°C/m.

Part B)
1) The rate at wich the reaction occurs depends on:
   a) the temperature of the reaction
b) the struct and realtive orientation of the reacting particles
   c) all of the above
   d) the concentration of the reacting particles
   e) none of the above
2) The vapor pressure of water at 20°C is 17.5 mmHg. What is the vapor pressure of water over a solution prepared from 2.00 × 10² g of sucrose (C₁₂H₂₂O₁₁) and 3.50 × 10² g water?

Part C)
1) Identify the solute with the lowest van't Hoff factor.
   a) Na₂SO4
   b) NaNO₃
   c) CaCl₂
   d) Mg(OH)2
   e) AlCl3
2) Which of the following solutions will have the lowest freezing point?
   a) 0.100 m Na₂CO₃
   b) 0.100 m NH₄NO3
   c) 0.100 m CH3CH2OH
   d) 0.100 m SnCl₄
   e) 0.100 m KBr

Answer 1