How is the equation for the reaction of copper and dilute nitric acid balanced?

CU is increased from 0 to +2, and N in HNO3 is reduced from +5 to +2 in NO;

2-0 = 2, 5-2 = 3, the least common multiple of 2 and 3 is 6;

Then write 3 before CU and 2 before NO (do not write 2 before HNO3 because there is a part of N in HNO3 that does not change the valency. That is, Hno3 acts partly as an acid and partly as an oxidant in this reaction);

Then Cu(no3)2 should also be written with 3 (Cu conservation);

Then, calculate that there are 8 n on the right, then write 8 before the hno3 on the left;

Finally, calculate the h or o on the left (obviously h is simpler), there are 8 h, then write 4 before h2o on the right;

Complete: 3cu + 8hnO3 = 3cu(NO3)2 + 2NO + 4H2O;

Summary: The equation of redox reaction generally finds the oxidizing element and the reducing element first, and then balances the two first, and then considers the others, and H20 is generally considered last.

3cu + 8hno3 = 3cu(no3)2 + 2no↑ +4h2o

The process is as follows: it rises and falls according to the valence.

cu： 0---2---2x3

n： +5---2---3x2

So cu with 3 and no with 2

Cu atom is conserved, Cu(NO3)2 with 3

n atoms are conserved, and Hno3 is matched with 8

with 4h20

Copper reacts with dilute nitric acidChemical equations: 3cu+8hno3=3cu(no3)2+2no↑+4h2o。

Copper nitrate, is an inorganic substance with the chemical formula Cu(NO3)2, easy to deliquescent, soluble in water, solubility at 0.

It is 45g, add concentrated nitric acid, and it can be re-sunk. Oxides that decompose into nitrogen when red hot.

and copper oxide, which is decomposed by hydrochloric acid.

Common hydrates are hexahydrate Cu(NO3)2·6H2O and trihydrate Cu(NO3)2·3H2O. The former is a blue crystal, and the latter is a dark blue triangular crystal.

Physicochemical Properties:

It is easy to deliquescent, soluble in water, the solubility is 45g at 0, and concentrated nitric acid is added, which can be re-sunk. When red-hot, it decomposes into nitrogen oxides and copper oxides, which are decomposed by hydrochloric acid. Common hydrates are hexahydrate Cu(NO3)2·6H2O and trihydrate Cu(NO3)2·3H2O.

The former is a blue crystal with a relative density.

In order to, at the temperature of the loss of three molecules of crystal water to form trihydrate, 65 decomposition to form basic salt.

The latter is a dark blue triangular crystal.

Soluble in water and ethanol.

Its solution is acidic, the concentrated solution is green, the dilute solution is light blue, and it is dissolved in concentrated ammonia water to form a complex salt of copper tetraammonia dinitrate, which is easy to deliquescent. When dissolved in its crystalline water, it loses nitric acid to form basic copper nitrate when heated to 170, and decomposes into copper oxide when heated to 200. It is oxidizing, and it is easy to mix with carbon, sulfur and other substances or burn.

It is used for copper plating, pesticide making and enamel.

and dyes, etc. Soluble in medium concentration of nitric acid, copper nitrate can be prepared by the reaction of copper oxide or copper block with dilute nitric acid.

Hydrated copper nitrate is very different from anhydrous copper nitrate in nature.

The reaction equation of copper and dilute nitric acid, described in Chinese, is that copper plus nitric acid is equal to copper nitrate plus nitric oxide plus water. The equation that describes the reaction of copper dilute nitric acid with elemental symbols is: 3Cu + 8Hno3 = 3Cu(NO3)2 + 2No + 4H2O.

Copper reacts with dilute nitric acid at a general 3:8 ratio to produce nitric oxide, copper nitrate and water. If the concentration of nitric acid is very low, nitrogen-containing compounds such as nitrogen can also be generated.

Copper is a relatively weak reactive metal, nitric acid has strong oxidation, and the dilute nitric acid product is nitric oxide.

3cu+8hno3=3cu(no3)2+2no+4h2o

The reaction continues, and the metallic copper gradually dissolves and reacts off.

Equation for the reaction of copper with concentrated nitric acid:

cu+4hno3= cu(no3)2+2no2↑+2 h2o。

and dilute nitric acid reaction equation is as follows.

3cu ten 8hno3 (dilute) 3cu (no3) 2 deca 2 ten 4h2o

Copper reacts with dilute nitric acid to form copper nitrate, nitric oxide.

and water. The equation for its chemical reaction.

As follows: 3cu + 8hnO3 ==3cu(NO3)2 + 2NO + 4H2O

Copper is a relatively inert metal, which can react with nitric acid, and the products are different for different nitric acid concentrations, dilute nitric acid usually gives nitric oxide, and the concentrated nitric acid product is nitrogen dioxide.

3cu+8hno3=3cu(no3)3+2no↑+4h2o

Copper reacts with dilute nitric acid to form copper nitrate with nitric oxide and water; Instead of generating hydrogen, nitrate is more oxidizing than hydrogen ions.

Because nitric acid is more oxidizing under acidic conditions, it is able to react with less reactive metals.

3cu+8hno3==3cu(no3)2+2no↑+4h2o

For the sake of memorization, we can also memorize the coefficients directly.

Uplink: 38324 Downlink: 14122It is the measurement number of the reaction between copper and concentrated nitric acid and the reaction of dilute nitric acid. The specific analysis is as follows:

Uplink: 38324:

3Cu + 8Hno3 (dilute) = 3Cu (NO3) 2 + 2No + 4H2O38324 is the balancing coefficient of the reaction between dilute nitric acid and copper.

Downlink: 14122:

Cu + 4Hno3 (concentrated) = Cu (No3) 2 + 2 No2 + 2H2O14122 is the balance coefficient of the reaction between concentrated nitric acid and copper.

The chemical reaction equation strictly adheres to the law of conservation of mass, and after writing the chemical reaction equation and writing the reactants and products, the number of atoms on the left and right sides is often not equal, and the law of conservation of mass is not satisfied, which needs to be solved by calculating the balance.

The chemical equation for the reaction of copper and dilute nitric acid is: 3Cu + 8Hno3 = 3Cu (NO3) 2 + 2No + 4H2O.

Copper nitrate is an inorganic substance, the chemical formula is Cu(NO3)2, easy to deliquescent, soluble in water, the solubility is 45g at 0, and concentrated nitric acid is added, which can be re-sunk. When red-hot, the oxide that decomposes into nitrogen contains the residue of stupid and copper oxide, which is decomposed by hydrochloric acid.

Common hydrates are hexahydrate Cu(NO3)2·6H2O and trihydrate Cu(NO3)2·3H2O. The former is a vertical blue crystal, and the latter is a dark blue triangular crystal.

Uses: 1. It is used to manufacture purer copper oxide, and it is also a raw material for the manufacture of other copper salts and copper plating. It is also used in the manufacture of pesticides.

It is used as mordant, copper catalyst and accelerant. Enamel industry is used as a colorant. It is also used in the paint industry for the manufacture of inorganic pigments.

It is used as an enamel colorant, and is also used for copper plating, copper oxide and pesticides as analytical reagents and oxidants.

2. Copper nitrate can be used as a colorant for ceramics to prepare copper oxide, copper carbonate and copper catalysts with high purity. It can be used as a raw material for photoresistor materials, phosphor activators, and can also be used as electroplating and chemical reagents. <>