FeCl2 + CuO → FeO + CuCl2 составить ионное уравнение

A chemical reaction is a chemical change which results in the formation of one or more products. The initial reactants differ in physical or chemical characteristics from the products formed. Chemical reactions generally involve either the formation or the breaking of chemical bonds.

Combustion

When oxygen combines with another compound to form water and carbon dioxide. These reactions are exothermic, meaning they produce heat.

Synthesis

When two or more simple compounds combine to form a more complicated one. This is also known as a direct combination reaction.

A + B → AB

For example, iron and sulfur combine in a synthesis reaction to form iron (II) sulfide:

8Fe + S8 → 8FeS

Decomposition

The opposite of a synthesis reaction - a complex molecule breaks down to make simpler ones. This is also known as an analysis reaction.

AB → A + B

For example:

Cu(CO3) → CuO + CO2

2H2O → 2H2 + O2

Single displacement (Substitution)

When one element trades places with another element in a compound. In these kinds of reactions one element displaces another form a compound to form a new compound and the displaced element. Generally the more reactive elements displace the less reactive element in a compound.

A + BC → AC + B

For example:

Zn + H2SO4 → ZnSO4 + H2

Zn + 2 HCl → ZnCl2 + H2

Double displacement (Metathesis)

When the anions and cations of two different molecules switch places, forming two entirely different compounds. In these kinds of reactions the two reacting compounds exchange their radicals or ions to form two new compounds.

AB + CD → AD + CB

For example:

ZnO + 2HCl → ZnCl2 +H2O

NaCl(aq) + AgNO3(aq) → NaNO3(aq) + AgCl(s)

Acid-base

A special kind of double displacement reaction that takes place when an acid and base react with each other. As the name suggests, these kinds of reactions occur between an acid and a base. It is a neutralization reaction and is characterized by the formation of a salt and water. The hydronium (H+) ion in the acids reacts with the hydroxide (OH-) ion in the base to form these products.

HA + BOH → H2O + BA

For example:

HCl + NaOH → NaCl + H2O

HBr + NaOH → NaBr + H2O

Redox (Oxidation - Reduction)

In these kinds of reactions both oxidation and reduction take place simultaneously in the reaction. Oxidation is characterized by loss of electrons while reduction is characterized by gain of electrons. Here I2 is reduced to I- and S2O32- is oxidized to S2O42-:

2S2O32−(aq) + I2(aq) → S4O62−(aq) + 2I−(aq)

Hydrolysis

This reaction involves water.

X-(aq) + H2O(l) ↔ HX(aq) + OH-(aq)

Isomerization

In these type of reaction, the structural arrangement of a compound is altered. For example:

CH3-CH2-CH2-CH3 → CH3-CH3-CH-CH

Объяснение:

C2h2 + 2br2 = chbr2 - chbr2 n(c2h2) = 2,24/22,4=0,1 моль по уравнению n(с2н2) относится к n(br2) в соотношении 1 : 2, значит  n(br2) = 0,1 * 2 = 0,2 моль тоже по уравнению реакции n(с2н2) относится к n(chbr2 - chbr2) находятся в соотношении 1 к 1, значит n(chbr2 - chbr2) тоже равно 0,1 моль находим массу m(chbr2 - chbr2) = 0,1  × 346 = 34,6гр м(c2h2br4) = (12×2)+(1×2)+(80×4)=346