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Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 2.7.9 Practical: Prepare Lead(II)Sulfate

Category: IGCSE課程, 國際課程, 教材筆記, 福利干貨 Date: 2022年7月13日 下午6:26

Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 2.7.9 Practical: Prepare Lead(II)Sulfate

Practical: Prepare Lead(II)Sulfate

Aim:

To prepare a dry sample of lead(II) sulfate

Diagram:

 

 

2.7.9-Preparation-of-leadIIsulfate-12.7.9-Preparation-of-leadIIsulfate-22.7.9-Preparation-of-leadIIsulfate-32.7.9-Preparation-of-leadIIsulfate-4

 

The preparation of lead(II)sulfate by precipitation from two soluble salts

 

 

Method:

  • Measure out 25 cm3?of 0.5 mol dm3?lead(II)nitrate solution and add it to a small beaker
  • Measure out 25 cm3?of 0.5 mol dm3?of potassium sulfate add it to the beaker and mix together using a stirring rod
  • Filter to remove precipitate from mixture
  • Wash filtrate with distilled water to remove traces of other solutions
  • Leave in an oven to dry

 

?Soluble salt 1 = lead(II) nitrate????????Soluble salt 2 = potassium sulfateEquation for the reaction:

Pb(NO3)2??(aq) + K2SO4?(aq) → PbSO4?(s) + 2KNO3?(aq)

 

lead(II) nitrate + potassium sulfate → lead(II) sulfate + potassium nitrate

 

Exam Tip

Care should be taken with handling lead salts as they are toxic.

轉(zhuǎn)載自savemyexam

 

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