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Twelfth Grade (Grade 12) Solvents, Solutes, and Solubility Questions

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Grade 12 Solvents, Solutes, and Solubility
If the solubility product of a sparingly soluble salt is [math]1.21 xx 10^-6[/math]at its room temperature, then its molar solubility will be
  1. [math]1.1 xx 10^-6[/math] M
  2. [math]1.1 xx 10^-10[/math] M
  3. [math]1.1 xx 10^-5[/math] M
  4. [math]1.1 xx 10^-3[/math] M
Grade 12 Solvents, Solutes, and Solubility
What is the diameter of the particles in a solution?
  1. [math]5 xx 10^-9 m[/math]
  2. [math]6 xx 10^-10 m[/math]
  3. [math]3 xx 10^-5 m[/math]
  4. [math]5 xx 10^-2 m[/math]
Grade 12 Solvents, Solutes, and Solubility
If Q: concentration of the substance momentarily produced in the solution by mixing the reagents
S : equilibrium solubility

then what is the correct representation for "relative supersaturation"?
  1. Relative supersaturation = [math][Q - S] /S[/math]
  2. Relative supersaturation = [math][Q + S] / [S][/math]
  3. Relative supersaturation = [math][Q xx S] / [S][/math]
  4. Relative supersaturation = [math][Q // S] xx S[/math]
Grade 12 Solvents, Solutes, and Solubility
Grade 12 Solvents, Solutes, and Solubility
For the following reaction:

HA [math]hArr[/math] [math]H^+ + A^-[/math]

Which of the following is the correct equation for the acid dissociation constant?
  1. [math]K_a = [H^+]/[HA][/math]
  2. [math]K_a = [A^-]/[HA][/math]
  3. [math]K_a = [H^+][/math]
  4. [math]K_a = {[H^+][A^-]}/{[HA]}[/math]
Grade 12 Solvents, Solutes, and Solubility
Which of the following is a heterogeneous system?
  1. pure salt
  2. mixture of gases
  3. true solution
  4. water and benzene
Grade 12 Solvents, Solutes, and Solubility
Grade 12 Solvents, Solutes, and Solubility
Grade 12 Solvents, Solutes, and Solubility
Which of the following descriptions correctly defines the dielectric constant?
  1. How well a solute can store electrical charge, in comparison to how well water can store electrical charge
  2. How well a solute can store electrical charge relative to the ability of free space to store electrical charge
  3. How well two electrons can retain their electrical charge
  4. Both (a) and (c)
Grade 12 Solvents, Solutes, and Solubility
If W grams of solute, having an equivalent weight E, is dissolved in V liters of the solution, what is the expression of normality (N) in this case?
  1. [math]N = (W/E) (1/V)[/math]
  2. [math]N = (WE)/V[/math]
  3. [math]N = (WV)/E[/math]
  4. [math]N = (EV)/W[/math]
Grade 12 Solvents, Solutes, and Solubility
The equilibrium of sodium chloride with its ions in a saturated solution would be shown by which equation?
  1. [math]NaCl(s) harr Na^+(aq)+ Cl^-[/math](aq)
  2. [math]NaCl(s) rarr Na^+(aq)+ Cl^-[/math](aq)
  3. [math]NaCl(s) rarr Na(s) + Cl(aq) [/math]
  4. [math]NaCl(s) larr Na(s) + Cl(aq)[/math]
Grade 12 Solvents, Solutes, and Solubility
Grade 12 Solvents, Solutes, and Solubility
Grade 12 Solvents, Solutes, and Solubility
Which of the following solvents is aprotic?
  1. Water
  2. Methanol
  3. Ethanol
  4. Chloroform
Grade 12 Solvents, Solutes, and Solubility
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