Question

10.Допишіть рівняння реакцій ( в дужках валентності елементів) 1) Li + O 2 = …. 2) H 2 O = …… 3) C(IV) + O 2 =……… 4) CH 4 + O 2 = …… +……. Вкажіть рівняння реакцій : а) Сполучення ; б) Розкладу.

Answer 1

Ответ:

4Li + O2 = 2Li2O (Li: +1, O: -2)

2H2O = 2H2 + O2 (H: +1, O: -2)

C(IV) + 2O2 = CO2 (C: +4, O: -2)

CH4 + 2O2 = CO2 + 2H2O (C: -4, H: +1, O: -2)

a) Реакція сполучення: два або більше елементів сполучаються, щоб утворити сполуку.

Приклад: 2H2 + O2 = 2H2O

б) Реакція розкладу: реакція, в якій сполука розкладається на два або більше менш складних продуктів.

Приклад: 2H2O = 2H2 + O2

Answer 2

Equation 1: Li + O2 = ...

The equation represents the reaction between lithium (Li) and oxygen (O2). To balance the equation, we need to ensure that the number of atoms of each element is the same on both sides of the equation.

The balanced equation is:

2Li + O2 = 2Li2O [[1]]

Equation 2: H2 + O2 = ...

This equation represents the reaction between hydrogen (H2) and oxygen (O2). Again, we need to balance the equation by ensuring the same number of atoms on both sides.

The balanced equation is:

2H2 + O2 = 2H2O [[2]]

Equation 3: C(IV) + O2 = ...

This equation represents the reaction between carbon in its +4 oxidation state (C(IV)) and oxygen (O2). Balancing the equation requires adjusting the coefficients to ensure the same number of atoms on both sides.

The balanced equation is:

C(IV) + 2O2 = CO2 [[3]]

Equation 4: CH4 + O2 = ...

This equation represents the reaction between methane (CH4) and oxygen (O2). Balancing the equation involves adjusting the coefficients to achieve the same number of atoms on both sides.

The balanced equation is:

CH4 + 2O2 = CO2 + 2H2O [[4]]

Reaction Types:

a) Combination Reaction:

A combination reaction occurs when two or more substances combine to form a single product. In this type of reaction, the reactants join together to create a new compound.

Example: The reaction between hydrogen gas (H2) and oxygen gas (O2) to form water (H2O) is a combination reaction.

H2 + O2 = 2H2O

b) Decomposition Reaction:

A decomposition reaction occurs when a compound breaks down into two or more simpler substances. In this type of reaction, a single compound is broken down into its constituent elements or simpler compounds.

Example: The decomposition of hydrogen peroxide (H2O2) into water (H2O) and oxygen gas (O2) is a decomposition reaction.

2H2O2 = 2H2O + O2

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