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Lelechka
1 month ago
10

C2H5OH(aq) + MnO− 4 (aq) → Mn2+(aq) + CH3COOH(aq) of acetic acid from ethanol by the action of permanganate ion in acidic soluti

on, identify the reducing agent. 1. MnO− 4 2. CH3COOH 3. Mn2+ 4. C2H5OH 013 (part 2 of 2) 10.0 points Balance the equation by using oxidation and reduction half reactions. What is smallest possible integer coefficient of MnO− 4 in the combined balanced equation?
Chemistry
1 answer:
Tems11 [2.7K]1 month ago
4 0

Response:

Ethanol serves as a reducing agent.(C_2H_5OH)

The lowest integer coefficient for MnO_4^- in the balanced equation is 4

Clarification:

A redox reaction, or oxidation-reduction reaction, is defined as one in which oxidation and reduction processes occur simultaneously.

Oxidation is the process whereby a substance loses electrons, resulting in an increase in oxidation state. In contrast, reduction entails a substance gaining electrons, leading to a decrease in oxidation state.

Reducing agents enable other substances to undergo reduction while becoming oxidized themselves.

Conversely, oxidizing agents facilitate other substances' oxidation while being reduced in the process.

For the chemical reaction in question, the half-reaction would be:

Oxidation:

Reduction:

To balance the oxygen atoms on both sides

C_2H_5OH(aq)+MnO_4^-(aq)\rightarrow CH_3COOH(aq)+Mn^{2+}(aq)

For oxidation:

For reduction:

C_2H_6O\rightarrow C_2H_4O_2

MnO_4^-\rightarrow Mn^{2+}Then balance the hydrogen atoms on both sides.

  • For oxidation:
For reduction:

C_2H_6O+H_2O\rightarrow C_2H_4O_2

Lastly, balance the charge.MnO_4^-\rightarrow Mn^{2+}+4H_2O

  • For oxidation: For reduction:

C_2H_6O+H_2O\rightarrow C_2H_4O_2+4H^+

To balance the electrons, multiply the oxidation reaction by 5 and the reduction by 4 before combining both equations for a balanced redox reaction.

MnO_4^-+8H^+\rightarrow Mn^{2+}+4H_2OOxidation:

  • Reduction:
The finalized balanced chemical equation in acidic conditions will be:

C_2H_6O+H_2O\rightarrow C_2H_4O_2+4H^++4e^-

MnO_4^-+8H^++5e^-\rightarrow Mn^{2+}+4H_2O

In this redox process, ethanol acts as the reducing agent while the permanganate ion serves as the oxidizing agent.

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How many molecules of PF5 are found in 39.5 grams of PF5?
Anarel [2989]

Response:

1.9 \times 10^{23} molecules of PF_5 can be found in 39.5 grams of PF_5.

Clarification:

Atomic weights: P= 31, F= 19,

The molar mass equals 1 atomic weight of P + 5 atomic weights of

 F= 31+5 × 19\times = 31+95

=126 g/mole

The number of moles in 39.5 gm of

equals \frac{Mass}{Molar mass}

 = \frac{39.5}{126}moles

 =0.3134 moles

1 mole of any substance encompasses

0.3131 moles comprises 0.3134

= 1.9 \times 10^{23} molecules

Thus, 1.9 \times 10^{23} molecules of PF_5 can be found in 39.5 grams of PF_5.

7 0
1 month ago
Calculate the pH of a polyprotic acid given and sketch the titration curves for the following reaction:
Tems11 [2777]
(1). pH = 1.70 (2). pH = 2.3 (3). pH = 3.3 (4). pH = 4.3 (5). pH = 8.41 (6). pH = 10.22. The explanation indicates that the acid is represented by H₂A, and the titration curve shows clear transitions at both equivalence points due to the following reactions: H₂A + OH⁻ → HA⁻ + H₂O and HA⁻ + OH⁻ → A²⁻ + H₂O. Calculations conclude with the corresponding pH values at specified points.
8 0
1 month ago
For each reaction, identify the element that gets reduced and the element that gets oxidized. 2AgCl+Zn⟶2Ag+ZnCl2 Identify the el
KiRa [2933]

Answer:

Explanation:

The oxidation state corresponds to the charge of each atomic ion. An increase indicates oxidation of the element while a decrease reflects reduction of the element.

2AgCl+Zn⟶2Ag+ZnCl2

Zinc undergoes oxidation, while Ag experiences reduction.

Ag⁺ changes to Ag (oxidation state decreases), thus Ag is reduced.

Zn alters to Zn⁺² (oxidation state increases), hence Zn is oxidized.

4NH₃+3O₂⟶2N₂+6H₂O

The oxidation state of nitrogen in ammonia is -3

whereas it is zero in elemental nitrogen.

An increase in the oxidation state indicates nitrogen is oxidized.

The oxidation state of oxygen is zero when in molecular oxygen and -2 when in water. Therefore, the oxidation state decreases, indicating oxidation is reduced.

Fe₂O₃+2Al⟶Al₂O₃+2Fe

The oxidation state of Fe in Fe₂O₃ is +3, switching to zero in Fe, so iron is reduced.

Aluminum's oxidation state is zero in Al, rising to +3 in Al₂O₃, indicating it is oxidized.

7 0
2 months ago
Compute 4.659×104−2.14×104. Round the answer appropriately.
lions [2927]

Answer: 25,200.


Explanation:


1) Starting with: 4.659 × 10⁴ - 2.14 × 10⁴


2) Significant figures need to be considered.


Because the powers are equal (10⁴), the decimal values can be subtracted directly. However, it is essential to first check significant figures and the count of decimal places.


3) The figure 4.659 × 10⁴ has four significant digits (4, 6, 5, and 9), whereas 2.14 × 10⁴ contains three significant digits (2, 1, and 4).


4) When adding or subtracting values with a different number of decimal places, the answer must reflect the same number of decimal places as the number with the least amount of decimal precision.


5) Prior to performing subtraction, it is necessary to round the numbers to the least decimal places. Given that 2.14 has two decimal places and 4.659 has three, round 4.659 to 4.66.


6) Now perform the subtraction 4.66 - 2.14 = 2.52


7) Then multiply by the power of 10: 2.52 × 10⁴ = 25,200. This is the final answer.

5 0
1 month ago
Read 2 more answers
An unknown liquid has a mass of 4.25 × 108 mg and a volume of 0.250 m3. what is the density of the liquid in units of g/ml?
VMariaS [2998]
Density is calculated as mass divided by volume.
  Step one:
Convert m³ to ml.
1 m³ = 1,000,000 ml
0.250 m³ x 1,000,000 = 250,000 ml
  Step two: Convert mg to g.
1 mg = 0.001 g, hence 4.25 x 10^8 mg equals 0.459 g.
Consequently, the density comes out to be 0.459 g/250,000 = 1.836 x 10^-6 g/ml.
8 0
2 months ago
Read 2 more answers
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