Question

Визначити ступінь окиснення елементів в реакції (дописати коефіцієнти) Fe + O2 -> Fe2O3 K2O + H3PO4 -> K4PO4 + H2O H2S + O2 -> SO2 + H2O допоможіть будь ласка

Answer 1

Ответ:

Объяснение:

4Fe + 3O2 = 2Fe2(3+)O3(2-)

3K2O + 2H3PO4 = 2K3(1+)PO4(3-) + 3H2O

2H2S(2-) + 3O2= 2S(4+)O2 + 2H2O

Answer 2

Determining the Degree of Oxidation of Elements in Reactions

To determine the degree of oxidation of elements in a reaction, we need to assign oxidation numbers to each element in the reactants and products. The oxidation number represents the charge an atom would have if electrons were transferred completely. Here's how we can determine the oxidation numbers for the given reactions:

1. Fe + O2 -> Fe2O3

In Fe2O3, oxygen is typically assigned an oxidation number of -2. Let's assume the oxidation number of Fe is x.

The sum of the oxidation numbers in a neutral compound is zero. Therefore, we can write the equation as:

2x + 3(-2) = 0

Simplifying the equation, we get:

2x - 6 = 0

Solving for x, we find that the oxidation number of Fe in Fe2O3 is +3.

2. K2O + H3PO4 -> K4PO4 + H2O

In K4PO4, oxygen is typically assigned an oxidation number of -2. Let's assume the oxidation number of K is x and the oxidation number of P is y.

The sum of the oxidation numbers in a neutral compound is zero. Therefore, we can write the equation as:

2x + 4(-2) + 3(y) + 4(-2) = 0

Simplifying the equation, we get:

2x - 8 + 3y - 8 = 0

Solving for x and y, we find that the oxidation number of K in K4PO4 is +1 and the oxidation number of P is +5.

3. H2S + O2 -> SO2 + H2O

In SO2, oxygen is typically assigned an oxidation number of -2. Let's assume the oxidation number of S is x.

The sum of the oxidation numbers in a neutral compound is zero. Therefore, we can write the equation as:

2(x) + 2(-2) = 0

Simplifying the equation, we get:

2x - 4 = 0

Solving for x, we find that the oxidation number of S in SO2 is +4.

I hope this helps! Let me know if you have any further questions.