Podcast
Questions and Answers
What is the process of removing hardness-producing salts from water known as?
What is the process of removing hardness-producing salts from water known as?
- Water purification
- Hardness removal
- Lime soda process
- Water softening (correct)
Which method employs the addition of lime and soda to chemically convert soluble calcium and magnesium salts into insoluble compounds?
Which method employs the addition of lime and soda to chemically convert soluble calcium and magnesium salts into insoluble compounds?
- Soda softening
- Calcium conversion method
- Lime-soda process (correct)
- Magnesium precipitation technique
What are the products of the lime-soda process for water softening?
What are the products of the lime-soda process for water softening?
- Sodium chloride and magnesium carbonate
- Calcium chloride and magnesium hydroxide
- Sodium carbonate and calcium hydroxide
- Calcium carbonate and magnesium hydroxide (correct)
What reaction takes place when slaked lime is added to water with carbon dioxide?
What reaction takes place when slaked lime is added to water with carbon dioxide?
Which method involves the precipitation of calcium and magnesium ions by the addition of lime and soda ash?
Which method involves the precipitation of calcium and magnesium ions by the addition of lime and soda ash?
What happens when slaked lime reacts with bicarbonate hardness?
What happens when slaked lime reacts with bicarbonate hardness?
What is added to remove magnesium non-carbonate hardness?
What is added to remove magnesium non-carbonate hardness?
What is the pH required to precipitate Mg(OH)2?
What is the pH required to precipitate Mg(OH)2?
What is used to stabilize the excess lime and magnesium hydroxide?
What is used to stabilize the excess lime and magnesium hydroxide?
What is the primary impurity in quicklime?
What is the primary impurity in quicklime?
In which form is slurry lime written?
In which form is slurry lime written?
What is used to entraps the fine precipitates in the COLD LIME-SODA PROCESS?
What is used to entraps the fine precipitates in the COLD LIME-SODA PROCESS?
What is used to remove calcium non-carbonate hardness?
What is used to remove calcium non-carbonate hardness?
What is added to stabilize the calcium carbonate?
What is added to stabilize the calcium carbonate?
What chemical method uses lime and soda mixed with water at room temperature to remove hardness?
What chemical method uses lime and soda mixed with water at room temperature to remove hardness?
What is required to raise the pH when precipitating Mg(OH)2?
What is required to raise the pH when precipitating Mg(OH)2?
