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What else can I help you with?
Is salt strong?
The Mohs hardness of of NaCl is 2,5.
Why temporary hardness is removed from water by boiling but permanent hardness is not?
Permanent hardness is hardness (mineral content) that cannot be removed by boiling. It is usually caused by the presence in the water of calcium and magnesium sulphates or chlorides which become more soluble as the temperature rises.
What is the hardness of Flint according to the mohs scale of hardness?
flint is a type of quartz, so it has a hardness of about 7 on the mohs scale of hardness
What is the Brinell hardness test used for?
The Brinell hardness test is a standardized test in material science. It measures the hardness of a metal by measuring the indentation on the material caused by an indenter.
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.
If you weighed 79.00 grams of NaCl how many mole of NaCl did you weigh?
I'll see if I can type it out for you.. 79g NaCl x (1 mol NaCl)/(58.44g NaCl) = 1.35 mol NaCl 1 mol NaCl = 58.44g (because Na is 22.99g and Cl is 35.45g)
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 are the factors on which hardness of a material depends?
Hardness of a material depends on the type of bonding between atoms.
What is the hardness of fingernails?
Type your answer here... 5
Name the type of salt we have?
Table salt is NaCl
What type of substance is chloride?
NaCl is an ionic compound.
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.
