How to remove calcium carbonate and how to remove sodium carbonate from calcium carbonate

Hydrochloric acid. Removal method: Because calcium carbonate can react with hydrochloric acid to form gas and solution, silica will not react and will not dissolve, so it is filtered and separated.

Equation: CaCo +2HCl=CaCl +Co +H 0Note: Dilute nitric acid can also be used, but sulfuric acid cannot be added casually, because CaSO4 is also precipitated.

Calcium carbonate is neutral, basically insoluble in water, soluble in hydrochloric acid. It is one of the most common substances on earth, found in aragonite, calcite, chalk, limestone, marble, travertine and other rocks, and is also the main component of animal bones or shells. Calcium carbonate is also an important building material and has a wide range of industrial uses.

With hydrochloric acid, note that sulfuric acid cannot be used, because the calcium sulfate produced by sulfuric acid is a slightly soluble substance.

Many acids can be, hydrochloric acid is commonly used, pay attention to dilution.

1) A small amount of sodium carbonate is mixed in the solid of sodium hydrogen oxide, and the method of removing impurities is --CO2!

Na2CO3 + CO2 + H2O ==2NaHCO32) CO2 gas is mixed with a small amount of HCl gas, and the method to remove impurities is to ---NaHCO3 cavity washing and dismantling gas!

nahco3 + hci ==naci + co2 + h2o

1) There is a small amount of sodium carbonate in the sodium bicarbonate solid, and the method of removing impurities is --CO2!

Na2CO3 + CO2 + H2O ==2NaHCO32) CO2 gas is mixed with a small amount of HCl gas, and the method of removing impurities is ---NaHCO3 washing!

nahco3 + hci ==naci + co2 + h2o

There is no calcium carbonate in the water. Because calcium carbonate is insoluble in water.

Only calcium bicarbonate is present in the water, which is produced by calcium carbonate + carbon dioxide + water, which is a soluble salt. This substance is harmful to the human body, so it should be removed.

Calcium bicarbonate is very unstable and can be decomposed by heating (i.e., boiling water) to reduce calcium bicarbonate to calcium carbonate. The reduced calcium carbonate adheres to the surface of the heating vessel and forms scale.

In this way, calcium carbonate is removed.

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Excessive calcium carbonate will make the hardness of the water high, and the tank of the boiling water container is easy to scale (including water heaters), and it is easy to get stone diseases after long-term drinking. It is recommended to choose a softened water purifier, which does not need to be too good, ordinary 3-level filtration can be done, there are two kinds of filter elements, one is the softening core, through the exchange of resin, replace the calcium ions in the water with the sodium ions in the filter element, so as to reduce the hardness of the water, the filter element can be used repeatedly, this water purifier ** is about 450. The other is the ultrafiltration element, the accuracy of the ultrafiltration element is microns, which can effectively remove impurities in the water, ** at about 700.

Ask how hardness water softens.

Question: I run a washing plant and use a lot of water.

Add an appropriate amount of hardness reducer. 2.Pre-leaching is performed with cation exchange natural resin to thoroughly soften the water hardness.

3.Partially change the water, mix with low hardness water or pure water. 2. When the water hardness is too low, the debugging method that can be used as appropriate is:

1.Debugging with hard water additives, e.g. adding the right amount of hardness booster.

2.It is appropriate to add a little coral sand or marble sand in the aquarium to increase the hardness of the water, but at the same time, it is necessary to pay attention to the change of water pH content. 3.

Partially change the water and mix with high hardness water.

With vinegar, wash off slowly and soak for a while. As long as it's acidic, it's fine.