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calcium and magnesium
Wiki User
∙ 11y ago
Wiki User
∙ 10y agoTemporary hardness: CaHCO3 and MgHCO3
Permanent hardness: CaSO4, CaCO3, MgSO4
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Do Calcium bicarbonate salts cause hardness to the water?
Yes. it causes temporary hardness of water, which can be generally removed by boiling water.
Which does not cause hardness of water?
Magnesium sulfate (MgSo4) does not cause hardness of water.
Why Nacl and Kcl does not affect hardness of Water?
Because they are salts and thus are neutral. Also- water is also neutral.Improve:The above answer is not correct. Neutrality is not the issue. The reason is that sodium and potassium salts are readily soluble and will not precipitate out under normal conditions and so do not cause scale to build up in pipes and boilers. They also do not react with soap to form a scum and inhibit lathering.The sulphate, carbonate and chloride salts of calcium and magnesium are responsible for the hardness of water. They cause something called 'permanent hardness' which is manifested by the interference with soap lathering and the formation of scum. This is due to the presence of the calcium and magnesium ions in the water which causes the precipitation of insoluble stearates from the soap. Sodium and potassium ions do not cause this effect.The other type of hardness called 'temporary hardness' is mainly due to carbonate and bicarbonate salts of calcium and magnesium. Calcium and magnesium carbonate are less soluble in hot water than cold and will precipitate out in hot water pipes and boilers forming limescale. This is because the carbonate salts in tap water are in equilibrium with bicarbonate salts and the heating drives off carbon dioxide and breaks down the bicarbonate to the much less soluble carbonate.
What is salts hardness on the hardness scale?
The Mohs hardness of sodium chloride is 2,5.
Why only magnisium sulphate and calcium sulphate cause hardness of water not sodium sulphate?
Because ALL sodium salts are soluble: carbonates and hydroxide and natural soap: "fatty acid carboxylates", contrarely to Ca- and Mg salts
Water hardness due to?
We often talk about water of different qualities in our daily life and very often we are faced with certain problems caused by hard water. The total hardness (TH) consists of all calcium (Ca) and magnesium (Mg) salts dissolved in it. Water hardness consists of two types of hardness, carbonate, and non-carbonate. Carbonate hardness consists of calcium and magnesium bicarbonates Ca(HCO3)2 and Mg(HCO3)2. Non-carbonate hardness consists of all their other salts such as chlorides, nitrates, sulfates, etc. After washing in hard water, stains from precipitated limescale remain which are very difficult to remove, textiles washed in “hard” water become stiff due to the deposition of limescale on fine textile fibers, and washing in hard water consumes more detergents due to the reaction of detergents with hardness salts and, creation of insoluble soaps – soap scum. Using soft water can solve all these problems.
Which type of hardness caused by NaCl?
Sodium chloride is not the cause of water hardness.
Which chemical does not cause hardness of water?
FeSO4
What is the function of calcium salts?
The function of calcium salts is to provide hardness and strength and resist compression.
What is salts hardness?
The Mohs hardness of sodium chloride is 2,5. The Mohs hardness is established by comparison with other minerals, having a known hardness.
What other substance cause by permanent hardness?
Permanent hardness in water is hardness due to the presence of the chlorides, nitrates and sulphates of calcium and magnesium, which will not be precipitated by boiling.
How does washing soda treat permanent hardness of water?
Calcium and magnesium ions present in hard water react with sodium carbonate to produce insoluble carbonates. The water now contains soluble and harmless sodium salts.
