A solution contains a mixture of four different compound: \(\mathrm{KCl}(a q),\) \(\mathrm{Fe}\left(\mathrm{NO}_{3}\right)_{3}(a q), \mathrm{MgSO}_{4}(a q),\) and \(\mathrm{N}_{2} \mathrm{H}_{4}(a q) .\) Which of these compounds would be easiest to separate via distillation? (A) \(\mathrm{KCl}(a q)\) (B) \(\mathrm{Fe}\left(\mathrm{NO}_{3}\right)_{3}(a q)\) (C) \(\mathrm{MgSO}_{4}(a q)\) (D) \(\mathrm{N}_{2} \mathrm{H}_{4}(a q)\)

Short Answer

Expert verified
The compound easiest to separate via distillation is \(\mathrm{N}_{2} \mathrm{H}_{4}(a q)\)

Step by step solution

01

Assess the Boiling Points

First, consider the boiling points of water and each compound in the solution. \(\mathrm{KCl}(a q)\), \(\mathrm{Fe}\left(\mathrm{NO}_{3}\right)_{3}(a q)\), and \(\mathrm{MgSO}_{4}(a q)\) are all salts, and generally dissolve in water to form ionic solutions. Their boiling points are considerably high and close to or more than that of water. However, \(\mathrm{N}_{2} \mathrm{H}_{4}(a q)\) or Hydrazine, exhibits a boiling point that is significantly lower than water.
02

Choose the Compound

Choose the compound with the lowest boiling point. Because Hydrazine boils at 114 °C, which is lower than the boiling point of water, it will vaporize first during the distillation process.
03

Validate the Answer

Validate the answer by recalling that distillation separates substances based on differences in boiling points. Thus, Hydrazine, as the compound with the significantly lower boiling point, can be separated easily.

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Most popular questions from this chapter

Nitrous acid, HNO, \(_{2},\) has a \(\mathrm{pK}_{\mathrm{a}}\) value of \(3.3 .\) If a solution of nitrous acid is found to have a pH of \(4.2,\) what can be said about the concentration of the conjugate acid/base pair found in solution? (A) \(\left[\mathrm{HNO}_{2}\right]>\left[\mathrm{NO}_{2}^{-}\right]\) (B) \(\left[\mathrm{NO}_{2}^{-}\right]>\left[\mathrm{HNO}_{2}\right]\) (C) \(\left[\mathrm{H}_{2} \mathrm{NO}_{2}^{+}\right]>\left[\mathrm{HNO}_{2}\right]\) (D) \(\left[\mathrm{HNO}_{2}\right]>\left[\mathrm{H}_{2} \mathrm{NO}_{2}^{+}\right]\)

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