The Permanent Hardness Occurs because of the Following Compounds (or Salts):
- CaCl2,
- MgCl2,
- CaSO4, and
- MgSO4.
Which type of salt makes water permanently hard?
Bicarbonates, Carbonates, Chlorides and Sulphates of Calcium and Magnesium causes temporary and permanent hardness. , The bucket is not half empty. It is larger than needed. Originally Answered: Which salt makes water permanently hard? Calcium carbonate aka limestone or chalk. 3 toxic foods for cats. One meat you should never feed your cat.
What is the difference between temporary and permanent hardness of water?
Temporary hardness of water is due to the presence of bicarbonates of calcium and magnesium while permanent hardness is due to the presence of soluble chlorides and sulphates of calcium and magnesium. Which salt are the main causes of temporary hardness?
How do you get rid of permanent hardness in water?
When the soluble salts of magnesium and calcium are present in the form of chlorides and sulphides in water, we call it permanent hardness because this hardness cannot be removed by boiling. We can remove this hardness by treating the water with washing soda. Which of the following metal salt is not responsible for permanent hardness in water?
What are the ions responsible for water hardness?
Non-Carbonate or Permanent Hardness Chloride and Sulfate (non-carbonate) ions are responsible for this type of water hardness.It is also known as permanent hardness because it isn’t remove from water by boiling it. It is only remove from water either by softening or demineralization process.
What is the best way to remove hardness from water?
Softening is a popular method for removal of hardness from water. Let us discuss both the types of water hardness in detail. #1. Carbonate or Temporary Hardness. Carbonate and bicarbonate ions are responsible for this type of water hardness.It is also known as temporary hardness because it removes from water when we boil the water. ...
What is the simple defination of hardness?
Simple defination of hardness is the amount of calcium & magnesium ions present in water. It is divided in two parts carbonate or temporary hardness and non-carbonate or permanent hardness. It is a major source of scale in water systems i.e.boiler water & cooling water systems.
What happens when you boil water?
When we boil the water carbonate & bicarbonates ions are present in water decomposes & insoluble carbonate is reformed.Boiling the water causes the precipitation of calcium and magnesium carbonate so that, calcium and magnesium ions are remove from water. #2.
How to determine calcium hardness?
Determine the calcium hardness by titration sodium hydroxide solution is added to the sample to maintain pH & then murexide indicator is added . Sample color turns into pink & titrate the sample against EDTA solution this time sample color will change from pink to purple. This is the end point of calcium hardness test.
How to find magnesium hardness?
Magnesium hardness is the difference of total hardness & calcium harness value. It is determined by subtracting calcium hardness value from total hardness value.
What is non carbonate water?
Non-Carbonate or Permanent Hardness. Chloride and Sulfate (non-carbonate) ions are responsible for this type of water hardness.It is also known as permanent hardness because it isn’t remove from water by boiling it. It is only remove from water either by softening or demineralization process. Example: CaCl2, MgCl2, CaSO4, MgSO4.
Is water hardness a major source of scale?
In Conclusion, Water hardness is a major source of scale in water treatment system. It is very essential to remove it from water by selecting proper water treatment program.
What are the salts in water?
Water contains, Total Dissolved Salts like Ca, Mg, Na, Cl, Fe, Br, etc., which are dissolved naturally, out of these 55% constitutes of Ca & Mg which is responsible for the hardness in Water generally.
Why do salts concentrate in the ocean?
2. Due to the cycle of water (evaporation-cloud formation-condensation-precipitation-runoff-ocean) the salts will concentrate on the ocean. When water evaporates the salts are left behind, and since the ocean has no outlet, the salts will concentrate.
Why is water hard?
Hardness of water is due to the presence of salts of divalent ions like calcium and magnesium. Hence, all the salts mentioned above impart hardness to water.
What causes water to be hard?
Water hardness maybe classified as temporary hardness and permanent hardness.Temporary hardness is often caused by the presence of dissolved bicarbonate minerals in water like calcium bicarbonate and magnesium bicarbonate . Temporary hardness can be reduced by boiling the water or by adding lime (Calcium hydroxide).However permanent hardness cannot be treated by boiling the water. Permanent hardness is caused by dissolved sulphate and chloride ions like calcium sulphate and/ or magnesium sulphate. Sulphates do not precipitate as the temperature increases and hence permanent hardness should be removed by a water softener that uses ion exchange process. A water softener treats hard water by displacing calcium and magnesium ions present in the water by sodium ions.Recommendations have been made for the maximum and minimum levels of calcium (40–80 ppm) and magnesium (20–30 ppm) in drinking water
What are the two minerals that make water hard?
Salts of Calcium and Magnesium are responsible for hardness of water. Bicarbonates, Carbonates, Chlorides and Sulphates of Calcium and Magnesium causes temporary and permanent hardness.
What causes hard water?
It is not really salts but minerals that are the cause of hard water. As surface water perculates down to underground reservoirs it passes through deposits of limestone and chalk. Along this route it picks up calcium and magnesium carbonate.
What are the elements that are found in sea water?
Through a process called weathering, water will dissolve some of the minerals present on the Earth's crust and will carry these elements to the ocean. Sodium and Chlorine are light elements that are abundant on the crust, that is why they are the main constituent of minerals in sea water.
Answer
Temporary hardness is due to the presence of bicarbonates of calcium and magnesium ions. It can be easily removed by boiling. Permanent hardness is due to the presence of chlorides and sulphate of calcium and magnesium ions.
Answer
Temporary hardness is due to the presence of bicarbonates of calcium and magnesium ions. It can be easily removed by boiling. Permanent hardness is due to the presence of chlorides and sulphates of calcium and magnesium ions.
New questions in Chemistry
the student takes a piece of nickel metal and places it in sulfuric acid. The solution begins to bubble. The remaining liquid is an ionic solution. Wh …
