How much calcium hydroxide do you need to add, and can calcium hydroxide be used in one step?

There is no need to do experimental tests, but you can do it according to the definition of pH value.

The pH is the negative power of the hydrogen ion concentration of 10, which is about to be neutralized to a pH of 7, which can be subtracted by 10 (-7).

The resulting concentration difference is. (Actually, in most cases, this subtraction step can be omitted because it doesn't make much difference.) ）

100 tons of well water is 100000 10 5l.

So the hydrogen ions that need to be neutralized are altogether.

There are 2 mol of hydroxide ions per mol of calcium hydroxide.

So calcium hydroxide is needed.

That is, grams. Isn't that a much smaller number than you think?

Because there is a "jump" in the pH titration process, when the pH is close to 7, a very small number of hydrogen ions or hydroxide ions are added, and the pH change is very large.

Test it yourself and take one kilogram of well water for experiments. Tested with a pH meter. Weigh 1 kg of calcium hydroxide first.

Then gradually add to the well water, keep stirring, until the pH meter detects that the pH is 7, stop adding, see how much calcium hydroxide is left, assuming that the remaining mass of calcium hydroxide is m, then the calcium hydroxide used is the mass (1kg-m), the landlord understands no. A thousand kilograms is equal to one ton, which the landlord himself converts.

Calcium hydroxideCalcium oxide can be reached in one step, and the chemical reaction equation is as follows:

Chemical equation of calcium hydroxide pyrolysis at high temperature.

The atomic weight of calcium.

It is digging 40, the molecular weight of calcium oxide is 56, and the calcium content in 100 grams of calcium oxide is: 100 * 40 56 = grams of Lu Sanshi.

In the case of pure calcium oxide, based on the mass ratio of 5:2, it can be concluded that it contains more than about grams of calcium.

Calcium hydroxideThe addition of water equals heat release. Calcium hydroxide dissolved in water belongs to the exothermic reaction of the land zone.

Combustion, neutralization, metal oxidation, thermite reactions, more active metal and acid reactions, and reactions from unstable substances to stable substances Most of the chemical reactions are exothermic, and most of the decomposition reactions are endothermic redox reactions that can be carried out spontaneously.

Duhu is an exothermic reaction.

pH=10 can ask for N(OH-)=C(OH-)v= mol then the old man carries n[ca(oh)2]=

The mass of calcium oxide is the quality of water.

Summary. Calcium oxide reacts with water to form calcium hydroxide with the following chemical formula: Cao + H2O Ca(OH)2 According to stoichiometry, one kilogram of calcium oxide produces 1 56 moles of calcium oxide.

According to the above chemical reaction equation, the stoichiometric ratio of calcium oxide to water is 1:1, so 1 56 moles of water can completely react to produce 1 56 moles of calcium hydroxide. While the molecular weight of 1 mole of calcium hydroxide is, so the mass of 1 56 moles of calcium hydroxide is grams.

Thus, one kilogram of calcium oxide and one kilogram of water react to produce grams or Yorks of calcium hydroxide.

Calcium oxide reacts with water to form calcium hydroxide with the following chemical formula: Cao + H2O Ca(OH)2 According to the stoichiometric Li loss rolling method, one kilogram of calcium oxide produces 1 56 moles of calcium oxide. According to the above chemical reaction equation, the stoichiometric ratio of calcium oxide and water is 1:

1. Empty so 1 56 moles of water can completely react to produce 1 56 moles of calcium hydroxide. While the molecular weight of 1 mole of calcium hydroxide is, so the mass of 1 56 moles of calcium hydroxide is grams. Thus, one kilogram of calcium oxide and one kilogram of water react to produce grams or Yorks of calcium hydroxide.

Good. What is the approximate molecular weight of triethylammonia hydrochloride aqueous solution?

The molecular formula of Triethylamine hydrochloride is C6H15N HCl, and its molecular weight is about g mol. Molecular weight refers to the relative molecular mass of a monolithic substance, and it is measured in g mol.

The molecular weight of triethylamine hydrochloride sonic solid is the same as its molecular weight in aqueous solution? I mean, triethylamine hydrochloride is the same as the 1:1 molecular weight when added with water without saturation and dust shortage?

The molecular weight of a solid triethylamine hydrochloride is different from the molecular weight in its aqueous solution. In stoichiometry, the molecular weight of triethylamine hydrochloride is g mol, while its molecular weight in aqueous solution depends on its dissociative behavior in water. Triethylamine hydrochloride solids consist of one triethylamine molecule and one hydrochloric acid molecule, the molecular weight of which is fixed.

However, when it is added to water, the triethylamine hydrochloride molecule is dissociated by the water molecule into triethylamine and hydrochloric acid, a process called ionization. In aqueous solutions, the molar concentrations of triethylamine and hydrochloric acid change with their solubility, and molecular weight is no longer an applicable concept. In the absence of saturation, the molar concentration of triethylamine and hydrochloric acid in the aqueous solution depends on the quality of the triethylamine hydrochloride added and the volume of water added.

Therefore, the molecular weight of the aqueous solution of triethylamine hydrochloride is not a fixed value, but variable.

Upstairs, the phase basis code of Ca(OH)2 is miscalculated for the molecular mass, which is 74, not 64

Let the mass of calcium hydroxide that can be obtained is x

cao+h2o=ca(oh)2

100g x

56/100=74/x

x = A: 100 grams of calcium oxymodulated calcium can be reacted with water to obtain hydrogen calcium oxide.

Summary. The molecular weight of calcium oxide is 56, and the molecular weight of calcium hydroxide is 74, x=y, so 60 can be made

The molecular weight of calcium oxide is 56, and the molecular weight of calcium hydroxide is 74, so it can be argued 60

60% of calcium hydroxide.

Summary. Hello dear, according to your question, I have found the following answer for you: How much calcium oxide is equivalent to effective calcium 40:

The useful calcium oxide is greater than or equal to the calcium oxide content, and the calcium oxide content is the inductive analysis of quicklime, which contains impurities and raw burning, and removing the impurities and raw burning is the useful calcium oxide content. Calcium oxide is an inorganic compound commonly known as quicklime. The physical properties are white powder on the surface, gray-white for impurities, light yellow or gray when containing impurities, and hygroscopic.

Calcium oxide is an alkaline oxide that is sensitive to moisture. It easily absorbs carbon dioxide and moisture from the air. It reacts with water to form calcium hydroxide and produces a lot of heat, which is corrosive.

Useful calcium oxide is a chemical substance, determination of useful calcium oxide content in lime: useful calcium oxide and other calcium in lime refers to the free state of calcium oxide.

Dear, hello, according to your question, you can find the following answers for your split Hengzhi: how much calcium oxide is equivalent to 40 effective calcium: useful calcium oxide is greater than or equal to oxygen to talk about calcium content, calcium oxide content is the inductive analysis of quicklime, which contains impurities and raw burning, and removing impurities and raw burning is the useful calcium oxide content.

Calcium oxide is an inorganic compound commonly known as quicklime. The physical properties are white powder on the surface, and the impure ones are gray-white, and when they contain impurities, they are light yellow or gray-sensitive, and they are hygroscopic. Calcium oxide is an alkaline oxide that is sensitive to moisture.

It easily absorbs carbon dioxide and moisture from the air. It reacts with water to form calcium hydroxide and produces a lot of heat, which is corrosive. Useful calcium oxide is a chemical substance, determination of useful calcium oxide content in lime:

The useful calcium oxide and other calcium in lime refer to the free state of calcium oxide.

Dear, for you to find out, the effective calcium 40 is equivalent to 25 calcium oxide.