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Why all the hardness of water is expressed in terms of Calcium carbonate?
Calcium carbonate is commonly used to express water hardness because it is a major component of the mineral deposits that form in plumbing and appliances. It is also a stable compound that is not affected by changes in pH, making it a reliable indicator of overall water hardness.
What is the average water hardness in well water?
The average water hardness in well water can vary depending on the location. Generally, well water tends to have higher levels of hardness compared to municipal water sources. In the United States, the average hardness ranges from 60-180 mg/L of calcium carbonate. Testing your well water is the best way to determine its specific hardness level.
Why is EBT indicator used for EDTA complexometric titration in determining water hardness?
The Eriochrome Black T (EBT) indicator changes color when it forms a complex with calcium and magnesium ions, which are responsible for water hardness. This color change signals the endpoint of the titration when all the calcium and magnesium ions are complexed with EDTA. Therefore, EBT is used to detect the endpoint of the titration and determine the water hardness.
Which does not cause hardness of water?
Magnesium sulfate (MgSo4) does not cause hardness of water.
How does boiling water affect the hardness of water?
Boiling water does not affect the hardness of water. Hardness in water is caused by minerals like calcium and magnesium, which remain in the water even after boiling.
How do you get rid of water hardness?
Salt is sometimes used to remove water hardness. Borax and soda are generally used as well to remove water hardness.
Wat salt is responsible for temporary and permanent hardness of water?
Temporary hardness of water: CaHCO3, MgHCO3 Permanent hardness of water: CaSO4, MgSO4
When water is used for quenching a plain carbon steel and maximum hardness is required what temperature should the water be?
55 degrees.
What is a water level indicator?
A water level indicator shows how high the water is.
How do you estimate hardness of water?
The water supplier can provide you the details on hardness level if you are on municipal water systems, If you are using private water then you can get tested in laboratories. You can even measure it with water hardness testing kits which you need to purchase.
What is difference between carbonate and noncarbonate hardness?
Carbonate hardness is the measure of hard ions associated with carbonate and bicarbonate anions contained in the water.Noncarbonate hardness is the portion of total hardness in water that is not produced by carbonates, but primarily by sulfate anions.
What are the two form of hardness found in water?
Hardness in water is usually characterised as temporary or permanent. Both are due to the presence of calcium or magnesium ions. If they are present as the hydrogen carbonate, when the water is boiled this is converted to the carbonate which precipitates out as a solid, leaving water which is no longer hard, so this is called temporary hardness. If they are present as the sulfate the solution is unaffected by boiling, and this is called permanent hardness.
