Describe the preparation of metallic sulphides.

Describe the preparation of metallic sulphides.

Answers

- Hydrogen sulphide reacts with metal ions in solution to form precipitates of metal sulphides; majority of which are black in colour.

(i). Procedure
- The gas is bubbled through solutions of the following salts: Pb (NO₃)₂, CuSO₄, FeSO₄ etc.

(ii). Observations and equations



Note:
- Most metal sulphides are insoluble in water except those of sodium, potassium and ammonium.

---

Kavungya answered the question on March 5, 2019 at 12:57

Next: List the uses of Alkenes.
Previous: Discuss factors that a hydrologist engineer should consider when planning and management stage for water resources.

View More Chemistry Questions and Answers | Return to Questions Index

Exams With Marking Schemes

• Grade 1
• Grade 2
• Grade 3
• Grade 4
• Grade 5
• Grade 6
• Grade 7
• Grade 8
• Grade 9
• PP1
• PP2
• Playgroup
• Form 1
• Form 2
• Form 3
• Form 4

Related Questions

• List the uses of Alkenes.(Solved)
  

  List the uses of Alkenes.

  Date posted: March 5, 2019.  Answers (1)

• Write the molecular and the structural formulas of Methane.(Solved)
  

  Write the molecular and the structural formulas of Methane.

  Date posted: March 5, 2019.  Answers (1)

• List three properties of hydrogen chloride gas.(Solved)
  

  List three properties of hydrogen chloride gas.

  Date posted: March 5, 2019.  Answers (1)

• List the uses of chlorine gas and its compounds.(Solved)
  

  List the uses of chlorine gas and its compounds.

  Date posted: March 5, 2019.  Answers (1)

• Explain the effects of chlorine gas on a burning candle.(Solved)
  

  Explain the effects of chlorine gas on a burning candle.

  Date posted: March 5, 2019.  Answers (1)

• List the environmental effects of acid rain.(Solved)
  

  List the environmental effects of acid rain.

  Date posted: March 5, 2019.  Answers (1)

• Using a table show the comparison between rhombic and monoclinic sulphur.(Solved)
  

  Using a table show the comparison between rhombic and monoclinic sulphur.

  Date posted: March 5, 2019.  Answers (1)

• State and explain three pollution effects of Nitrogen compounds. (Solved)
  

  State and explain three pollution effects of Nitrogen compounds.

  Date posted: March 5, 2019.  Answers (1)

• Describe the Laboratory preparation of Nitric (V) acid.(Solved)
  

  Describe the Laboratory preparation of Nitric (V) acid.

  Date posted: March 5, 2019.  Answers (1)

• Give four conditions necessary when citing a Haber process plant.(Solved)
  

  Give four conditions necessary when citing a Haber process plant.

  Date posted: March 5, 2019.  Answers (1)

• Draw a flowchart to show the Haber process.(Solved)
  

  Draw a flowchart to show the Haber process.

  Date posted: March 5, 2019.  Answers (1)

• Describe the action of aqueous ammonia on solution of metallic salts.(Solved)
  

  Describe the action of aqueous ammonia on solution of metallic salts.

  Date posted: March 5, 2019.  Answers (1)

• Describe the preparation of ammonium solution.(Solved)
  

  Describe the preparation of ammonium solution.

  Date posted: March 5, 2019.  Answers (1)

• Explain the action of heat on nitrates.(Solved)
  

  Explain the action of heat on nitrates.

  Date posted: March 5, 2019.  Answers (1)

• Write a summary on comparison between oxides of nitrogen.(Solved)
  

  Write a summary on comparison between oxides of nitrogen.

  Date posted: March 5, 2019.  Answers (1)

• Describe one method used in preparation of Nitrogen.(Solved)
  

  Describe one method used in preparation of Nitrogen.

  Date posted: March 5, 2019.  Answers (1)

• State the observation made in the combustion tube during preparation of ammonia (Solved)
  

  State the observation made in the combustion tube during preparation of ammonia
  

  Date posted: February 21, 2019.  Answers (1)

• Using an energy level diagram calculate the ?Hs of ammonium chloride crystals given that. (Solved)
  

  Using an energy level diagram calculate the ΔHs of ammonium chloride crystals given that.
  
  ΔHf of NH₃ (aq) = -80.54kJ mole^-1
  ΔHf of HCl (aq) = -164.46kJ mole^-1
  ΔHf of NH₄Cl (aq) = -261.7483kJ mole^-1
  ΔHs of NH₄Cl (aq) = -16.8517kJ mole^-1

  Date posted: February 20, 2019.  Answers (1)

• Given the following information below: Calculate ?H for the reaction; CuSO₄(aq) + 5H₂O-> CuSO₄ .5H₂O (aq) ?H=-77.4 kJmole^-1(Solved)
  

  Given the following information below:
  
  
  Calculate ΔH for the reaction;
  CuSO₄(aq) + 5H₂O-> CuSO₄ .5H₂O (aq) ΔH=-77.4 kJmole^-1

  Date posted: February 20, 2019.  Answers (1)

• Calculate the molar enthalpy of formation of carbon(II)oxide (CO) given : ?H?c of carbon-graphite = -393.5kJmole^-1, ?H?c of carbon(II)oxide (CO)= -283 kJmole^-1(Solved)
  

  Calculate the molar enthalpy of formation of carbon(II)oxide (CO) given : ΔHᶿc of carbon-graphite = -393.5kJmole^-1, ΔHᶿc of carbon(II)oxide (CO)= -283 kJmole^-1

  Date posted: February 20, 2019.  Answers (1)