What is CH3COOH + CaCO3 reaction?
Let me give you a little background and a simple trick on the same.CaCO3 (Calcium carbonate) is a salt which is basic in nature(just assume it as OH-) that means if it finds any acidic H it will fetch it. And how we gonna know whether a salt is basic, acidic or neutral in nature, I have made a trick in a video which is posted below.CH3CO-OH has acidic H (attached with O) and when it is made to react with calcium carbonate (dissolved in H2O), it fetches that acidic H and gives the below overall reaction. I hope you got the overall idea.2CH3COOH + caco3 = ( CH3COO)2Ca +H2O + CO2Source: Avesh Chemistry
Why is sulfuric acid not used to remove scales on the kettle?
The "scales" may in fact, be the sulfate precipitate of calcium, a common metal ion in hard water. More often than not the scales are CaCO3 or MgCO3. In acetic acid (aka, vinegar) the carbonates dissolve. But if H2SO4 was used then solid CaSO4 would form, which sort of defeats the purpose of removing the solid. Other acids, like HCl or HNO3 might react with the kettle itself, depending on what metal it is made of.
Urgent.....lots of help needed!!?
The 'Fur' deposits in a kettle are Carbonates of Calcium and Magnesium. The addition of vinegar causes a reaction which releases Carbon dioxide gas giving rise to the fizzing/foaming effect in the kettle. CaCO3 + 2CH3COOH ===> Ca(C2H3O2)2 + H2CO3 Calcium carbonate + vinegar (acetic acid) ==> Calcium acetate + Carbonic acid. The carbonic acid quickly dissociates to water and carbon dioxide gas. (The exact same reaction takes place with MgCO3).
What causes limescale in a kettle?
Calcium carbonate is quite insoluble, but in the presence of carbon dioxide, which generates carbonic acid (H2CO3), some calcium carbonate dissolves to form calcium bicarbonate, which is slightly soluble. CaCO3 + H2CO3 → Ca(HCO3)2. Some hard waters contain calcium carbonate and carbon dioxide as calcium bicarbonate.Then, when you heat the water, the CO2 is driven off: Ca(HCO3)2 → CO2 + H2O + CaCO3. The CaCO3 crystallizes out, preferably on previously deposited CaCO3, which may have deposited in scratches or other irregularities in the kettle. This will happen even if you do not boil off any water. Of course, if you boil off any water, minerals which have reached their solubility limit will drop out of solution.Mother nature does this process on geologic time scales to produce stalactites and stalagmites in caves.
Which salt can't cause hardness in water?
Magnesium and calcium salts cause hardness in water calcium chloride and magnesium chloride cause permanent hardnesscalcium carbonates and magnesium carbonates causes temporary hardness.Hard water is water that has high mineral content (in contrast with "soft water"). Hard water is formed when water percolates through deposits of limestone and chalk which are largely made up of calcium and magnesium carbonates. But water absorbent polymer contains acid that turns water to gel.Hard drinking water may have moderate health benefits, but can pose critical problems in industrial settings, where water hardness is monitored to avoid costly breakdowns in boilers, cooling towers, and other equipment that handles water. In domestic settings, hard water is often indicated by a lack of foam formation when soap is agitated in water, and by the formation of limescale in kettles and water heaters.[1] Wherever water hardness is a concern, water softening is commonly used to reduce hard water's adverse effects.
What is water hardness?
The ions are Ca2+ and Mg2+. Hardness is the presence of these ions, usually as carbonates, CaCO3 and MgCO3. These compounds cause permanent hardness. This means that to get rid of it, one must use a softening agent. Sometimes the compound present is calcium bicarbonate, Ca(HCO3)2, which causes "temporary" hardness. This means that one can soften the water by heating it: Ca(HCO3)2(aq) ===> CaCO3(s) + CO2(g) + H2O The CaCO3 formed settles out of the water.