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)" onclick="open_pr_link("https://xn--80ajuhcjbbaibcneei3k.xn--p1ai/")" > 3 1st International Forum “Growth Resources. Chemistry for life: state and business". The discussion was organized with the participation of the Eurasian Economic Commission...

thousand tons A year earlier, supplies of this product group in Russia fell by 3 %. The value of imports of “Plastic and plastic products” in 2019 amounted to $9,830 million, which is 1% more than a year ago. Small growth...

;kerosene – by 9.9%, diesel fuel– by 6.5%, liquid fuels – by 3.2%, natural gas supplies decreased by 0.3%. Crude oil supplies from Russia at the end of 2019 increased in volume by 3 %. Foreign exchange earnings...

in the amount of 3 % - in just one year, about 267.47 million tons of crude oil were sent to world markets. Let us recall that in 2018, an increase in crude oil supplies was also recorded at the level 3 %. Foreign exchange earnings from crude oil exports in 2019...

from the export of Khimprom products to foreign countries. The value of exports to these countries amounted to 19904 million rubles, which is 3 % less than a year ago. At the same time, on 3 % increased the value of exports of chemical industry products to countries...

Ministry of Industry and Trade of Russia March 24–26 in Moscow, at the Crocus Expo IEC: 3 1st International Forum “Growth Resources. Chemistry for life: state and business", specialized exhibition ChemicСos-2020, as well as the presentation of an annual award in the field of consumer chemicals and cosmetics...

Information

The expert named a condition for increasing the competitiveness of the Russian chemical products on the world market
Import of chemical products in 2019
Export of fuel and energy goods in 2019

The expert named a condition for increasing the competitiveness of Russian chemical products on the world market
Import of chemical products in 2019
Export of fuel and energy goods in 2019

Catalog of organizations and enterprises

Production, sales of iron oxide, silicon oxide, magnesium oxide, aluminum oxide, magnesium oxide, iron oxide, silicon oxide, aluminum oxide, chromium oxide, chromium oxide modified with iron oxide, ...

Sale of iron oxide, aluminum, silicon, magnesium, zirconium, vanadium, copper, manganese, chromium, tungsten, niobium, tantalum, cerium, praseodymium, gallium, tellurium wholesale and retail in Russia and the CIS) Production...

Manufacturer of cast iron, cast pipes, coal, coal tar, ammonium sulfate, benzene.

Large state enterprise full cycle(production of coal, iron, steel, rolled products, cement production, etc.). Annual productivity: 1.4 million tons. iron and steel; 1.6 million tons of steel...

Development of sulfide copper-nickel deposits on the Kola Peninsula. Production and sale of copper-nickel ores (nickel 3 -4%, copper 2- 3 %, iron 30-40%, sulfur 12-15%). Monthly supply volumes are 500 tons of ore.

Manufacturer and supplier of steel and iron.

Offers for purchase and sale of products

LLC TFK "COMTEKS" Ryazan - official representative RosNeft, TNK, Chevron, Petro-Canada, Castrol, CoolStream, Texaco, Tomflon, Agrinol. The Comtex company has been specializing in the sale of...

CJSC AltaiSpetsIzdeliya manufactures reserve fuel storage containers for diesel power plants, gas turbine plants, oil depots and gas stations. The product comes with all the necessary equipment...

We will supply PVC resin to your company. In stock various brands domestic and foreign manufacturers.

Pigment white, or as it is also called titanium dioxide, is a powder consisting of transparent crystals and is used in various fields of modern industry. Dye...

Sell ​​solvent for dilution paint and varnish materials based on polyvinyl chloride chlorinated resins PSH LS and PSH LN, vinyl chloride copolymers, epoxy resins and other film-forming substances...

We produce high-purity synthetic finely dispersed amorphous silicon dioxide (silica) with a highly developed surface. The products are manufactured under the trade name Kovelos. According to its properties and...

1. Compare by structure and properties:
a) Ca0 and Ca2+
b) Cu2+ (hydr) and Cu2+ (nonhydr);
c) H0₂ and H+.

2. Using the solubility table, give examples of five substances that form sulfate - SO₄2- ions - in solutions. Write down the equations for the electrolytic dissociation of these substances.

3. What information does the following equation contain:
Al(NO)= Al3++3NO₃-?
Give the names of the substance and ions.
Al(NO)= Al3++3NO₃-
This equation suggests that the substance aluminum nitrate is a strong electrolyte and in solution dissociates into ions: aluminum cation and nitrate ion.

4. Write down the dissociation equations: iron (III) sulfate, potassium carbonate, ammonium phosphate, copper (II) nitrate, barium hydroxide, of hydrochloric acid, potassium hydroxide, iron (II) chloride. Give the names of the ions.

5. Which of the following substances will dissociate: iron (II) hydroxide, potassium hydroxide, silicic acid, nitric acid, sulfur (IV) oxide, silicon (IV) oxide, sodium sulfide, iron (II) sulfide, sulfuric acid? Why? Write down possible dissociation equations.

6. In writing the equations for stepwise dissociation of sulfuric acid, the equal sign is used for the first step, and the reversibility sign is used for the second. Why?
H₂SO₄= H++HSO₄-
HSO₄-=H++SO₄2-
The dissociation of sulfuric acid occurs completely in the first stage, and partially in the second stage.

Electrolytic dissociation of NaCl.avi

Dissociation occurs in solutions and melts.
Soluble acids dissociate into hydrogen ions and acidic ions.
Soluble bases break down into positively charged metal ions and negatively charged hydroxide ions.
Medium salts dissociate into metal cations and anions of acid residues.
Acid salts decompose into metal and hydrogen cations and anions of acid residues.
Cations are metal ions and hydrogen H + .
Anions are ions of acidic residues and hydroxide ions OH – .
Ion charge is numerically equal to the valency of the ion in a given compound.
Use the solubility table to create dissociation equations.
IN chemical formula the sum of the charges of positively charged ions is equal to the sum of the charges of negatively charged ions.

Drawing up acid dissociation equations

(using the example of nitric and sulfuric acids)

Drawing up dissociation equations for alkalis
(soluble bases)

(using the example of sodium and barium hydroxides)

Soluble bases are hydroxides formed by active metal ions:
monovalent: Li + , Na + , K + , Rb + , Cs + , Fr + ;
divalent: Ca 2+, Sr 2+, Ba 2+.

Drawing up salt dissociation equations

(using the example of aluminum sulfate, barium chloride and potassium bicarbonate)

Self-control tasks

1. Write the dissociation equations for the following electrolytes: zinc nitrate, sodium carbonate, calcium hydroxide, strontium chloride, lithium sulfate, sulfurous acid, copper(II) chloride, iron(III) sulfate, potassium phosphate, hydrosulfide, calcium bromide, calcium hydroxychloride, sodium nitrate, lithium hydroxide.
2. Divide substances into electrolytes and non-electrolytes: K 3 PO 4 , HNO 3 , Zn(OH) 2 , BaCl 2 , Al 2 O 3 , Cr 2 (SO 4) 3 , NO 2 , FeBr 3 , H 3 PO 4 , BaSO 4 , Cu(NO 3) 2 , O 2, Sr(OH) 2, NaHSO 4, CO 2, AlCl 3, ZnSO 4, KNO 3, KHS.
Name the electrolyte substances.
3. Make up formulas for substances that can be formed by the following ions:

Name the substances and create equations for their dissociation.

Answers to tasks for self-control

2. Electrolytes :K 3 PO 4 – potassium phosphate, HNO 3 – nitric acid, BaCl 2 – barium chloride, Cr 2 (SO 4) 3 – chromium(III) sulfate, FeBr 3 – iron(III) bromide, H 3 PO 4 – phosphoric acid, Сu(NO 3) 2 – copper(II) nitrate, Sr(OH) 2 – strontium hydroxide, NaHSO 4 – sodium hydrogen sulfate, AlCl 3 – aluminum chloride, ZnSO 4 – zinc sulfate, KNO 3 – potassium nitrate, KHS – potassium hydrosulfide , Zn(OH) 2 – zinc hydroxide, BaSO 4 – barium sulfate.
Non-electrolytes : Al 2 O 3, NO 2, O 2, CO 2.

3.
a) N 2 SO 4, CaSO 4, NaMnO 4, MgI 2, Na 2 CrO 4, etc.;
b) KClO 3, Ba(OH) 2, AlPO 4, H 2 CO 3, etc.;
c) H 2 S, CaCl 2, FeSO 4, Na 2 SO 4, etc.