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Questions and Answers
Which process is used to prepare metallic sodium?
Which process is used to prepare metallic sodium?
- Electrolysis of aqueous sodium hydroxide
- Distillation of sodium chloride
- Electrolysis of molten sodium carbonate
- Electrolysis of molten sodium chloride and calcium chloride mixture (correct)
What is the primary use of sodium bicarbonate?
What is the primary use of sodium bicarbonate?
- As a catalyst in soap production
- In effervescent drinks and fruit salts (correct)
- Manufacturing glass
- As a weak acid for pH control
Which of the following statements about sodium thiosulphate is correct?
Which of the following statements about sodium thiosulphate is correct?
- It is primarily used in glass manufacturing.
- It acts as a purgative agent.
- It is a primary ingredient in baking soda.
- It is used as a fixing agent in photography. (correct)
What is the main use of sodium carbonate?
What is the main use of sodium carbonate?
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What is Begegnning known as when sodium carbonate is mixed with potassium carbonate?
What is Begegnning known as when sodium carbonate is mixed with potassium carbonate?
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Study Notes
Preparation of Metallic Sodium
- Metallic sodium is produced through electrolysis of a molten mixture containing 40% sodium chloride (NaCl) and 60% calcium chloride (CaCl2) using a Down’s cell.
Sodium Chloride (NaCl) Uses
- Commonly known as table salt, NaCl serves as a preservative in pickles, meat, and fish.
- NaCl is essential in the manufacturing of sodium hydroxide (NaOH), chlorine gas (Cl2), and soap.
- In Nelson and Castner-Kellner cells, NaCl acts as the primary raw material for producing caustic soda (NaOH).
Sodium Hydroxide (NaOH) Applications
- NaOH, also known as caustic soda, is utilized in the production of soap, dyes, and artificial silk.
- It plays a role in refining bauxite mineral.
Sodium Bicarbonate (NaHCO3) Characteristics
- Commonly referred to as baking soda, NaHCO3 is used in effervescent beverages and fruit salts.
- It serves a function in fire extinguishers and wool washing in the form of sesquicarbonate.
Sodium Carbonate (Na2CO3·10H2O) Insights
- Known as washing soda, Na2CO3·10H2O is crucial in glass manufacturing, soap, washing powder, and softening hard water.
- A mixture of sodium carbonate and potassium carbonate is referred to as a fusion mixture.
Sodium Sulfate (Na2SO4·10H2O) Attributes
- Known as Glauber’s salt, Na2SO4·10H2O is primarily used as a purgative.
Sodium Thiosulfate (Na2S2O3·5H2O) Functions
- Commonly called hypo, Na2S2O3·5H2O is an important chemical in photography, functioning as a fixing agent.
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