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denis-greek [22]
3 years ago
10

Idenify each statement below as either oxidation or reduction.

Chemistry
1 answer:
Alenkasestr [34]3 years ago
4 0

Answer:

1 = oxidation

2 = reduction

Explanation:

Oxidation:

Oxidation involve the removal of electrons and oxidation state of atom of an element is increased.

2I- ----> I₂+ 2e⁻

Reduction:

Reduction involve the gain of electron and oxidation number is decreased.

F + e⁻ ----> F⁻

Consider the following reactions.

4KI + 2CuCl₂  →   2CuI  + I₂  + 4KCl

the oxidation state of copper is changed from +2 to +1 so copper get reduced.

CO + H₂O   →  CO₂ + H₂

the oxidation state of carbon is +2 on reactant  side and on product side it becomes  +4 so carbon get oxidized.

Na₂CO₃ + H₃PO₄  →  Na₂HPO₄ + CO₂ + H₂O

The oxidation state of carbon on reactant side is +4. while on product side is  also +4 so it neither oxidized nor reduced.

H₂S + 2NaOH → Na₂S + 2H₂O

The oxidation sate of sulfur is -2 on reactant side and in product side it is also -2 so it neither oxidized nor reduced.

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8 0
3 years ago
Draw the Lewis structure for methane (CH4) and ethane (C2H6) in the box below. Then predict which would have the higher boiling
Alinara [238K]

Answer:

Ethane would have a higher boiling point.

Explanation:

In this case, for the lewis structures, we have to keep in mind that all atoms must have <u>8 electrons</u> (except hydrogen). Additionally, each carbon would have <u>4 valence electrons</u>, with this in mind, for methane we have to put the hydrogens around the carbon, and with this structure, we will have 8 electrons for the carbon. In ethane, we will have a bond between the carbons, therefore we have to put three hydrogens around each carbon to obtain 8 electrons for each carbon.

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I hope it helps!

7 0
3 years ago
How many places are there for electrons in the third shell of an atom?
Dafna1 [17]
Each shell can contain only a fixed number of electrons: The first shell can hold up to two electrons, the second shell can hold up to eight (2 + 6) electrons, the third shell can hold up to18 (2 + 6 + 10) and so on. The general formula is that the nth shell can in principle hold up to 2(n2) electrons.
7 0
3 years ago
When using evaporation/boiling, it is
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3 0
3 years ago
How many moles of O2 are in a flask with a volume of 0.45 L at a pressure of 320 kPa and a
Sliva [168]

Answer:

0.0833 moles of O₂

Explanation:

Most usual Law to solve this sort of problem, is the Ideal Gases Law

Pressure .  Volume = number of moles .  R . Temperature

where R is the Ideal Gases Constant → 0.082 L.atm/mol.K

First of all we need to convert the pressure from kPa to atm, because the Units of R

320 kPa . 1  atm / 101.3 kPa = 3.16 atm

Now, you replace data:

3.16 atm . 0.45L = mol . 0.082 L.atm/mol.K . 280K

(3.16 atm . 0.45L) / (0.082 L.atm/mol.K . 280K) = mol

0.0833 moles of O₂

7 0
3 years ago
Read 2 more answers
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