A student does a reaction that forms Pb(NO_3)_2 (aq). The student boils off some

Question

A student does a reaction that forms Pb(NO_3)_2 (aq). The student boils off some of the water in a beaker until Pb(NO_3)_2 (s) crystals form. The student vacuum filters this solution to collect the crystals. Since some of the crystals remain in the beaker, the student squirts water from their wash bottle in the beaker and pours this over the filter paper in the vacuum apparatus. When the student goes to collect the crystals from the paper they find that there is none there. Explain what happened and how it can be corrected.

Explanation / Answer

Lead nitrate is water soluble.

Some crystals remain in the beaker after vacuum filtration. The student squirts water from wash bottle in the beaker and pours this over the filter paper. Lead nitrate dissolves in this water. Hence, instead of using water from wash bottle, the student should have used mother liquor ( obtained from vacuum filtration ) which is saturated with lead nitrate and cannot dissolve more lead nitrate.

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.