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Maslowich
3 years ago
5

Choose the correct statement. The cathode is the electrode where the oxidation takes place. Both oxidation and reduction may tak

e place at the cathode, depending on the cell. The cathode is always positive. The anode is always negative. The cathode is the electrode where the reduction takes place.
Chemistry
1 answer:
gregori [183]3 years ago
6 0

Answer:

The cathode is the electrode where the reduction takes place.

Explanation:

Cell has three components:

an electrolyte and two electrodes which is a cathode and an anode.

Electrolyte is usually solution of the water or other solvents in which the ions are dissolved.

<u>In electrolytic cell:</u>

Negatively charged electrode is the cathode where the process of reduction takes place.

Positively charged electrode is the anode where the process of oxidation takes place.

<u>In galvanic cell:</u>

Positively charged electrode is the cathode where the process of reduction takes place.

Negatively charged electrode is the anode where the process of oxidation takes place.

<u>So, the correct answer is - The cathode is the electrode where the reduction takes place.</u>

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How many neutrons are in the nucleus of a potassium atom with a mass number of 39?.
lord [1]

Answer:

20 neutrons

Explanation:

neutrons = mass number - atomic number

mass number = 39, atomic number = 19

neutrons = 39 - 19 = 20

8 0
2 years ago
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Why is the statue of liberty made out of copper and not zinc?.
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Answer:

The statue of liberty was made of copper. Copper is extremely weather-resistant. It will gradually oxidize copper chloride, which is greenish in

Explanation:

Because it copper and it greenish

5 0
3 years ago
Determine the ph of a 0. 35 m aqueous solution of CH3NH2 (methylamine). The kb of methylamine is?
guajiro [1.7K]

The pH of 0.35 M of CH₃NH₂ is 12.09 and the k_b for methylamine is 4.4 x 10⁻⁴.

<h3>What is pH?</h3>

pHis the quantitative measure of acidity and basicity of an aqueous or other liquid solution. The scale range goes from 0 to 14. Water has a pH of 7 and is neutral in nature.

<h3>What is dissociation constant?</h3>

The dissociation constant is an equilibrium constant that describes the dissociation or ionization of a base or an acid

k_a describes the dissociation of an acid

k_b describes the dissociation of a base

For methylamine,

CH_3NH_2 + H_2O\Leftrightarrow CH_3NH_3^+ + OH^-

Initial concentration of methylamine = 0.35 M

Initial concentration of products = 0

Let, at equilibrium concentration of CH₃NH₂ = 0.35 - x

Then, concentration of CH₃NH₃⁺ and OH⁻ is x and x respectively

k_b = \frac{[CH_3NH_3^+] [OH^-]}{[CH_3NH_2]}

The dissociation constant for methylamine, k_b = 4.4 x 10⁻⁴

4.4 \times 10^-^4 = \frac{x.x}{0.35} \\x^{2} = 4.4 \times 10^-^4 \times 0.35\\x^{2}  = 1.54  \times 10^-^4 \\

x =0.0124

pOH = -log[OH] = -log(0.0124) = 1.91

pH + pOH = 14

pH = 14 - 1.91 = 12.09

Thus, the pH of methylamine is 12.09 and k_b is 4.4 x 10⁻⁴

Learn more about pH:

brainly.com/question/172153

#SPJ4

7 0
2 years ago
How many particles are in on mole?
shusha [124]

The answer is 1023 particles

6 0
3 years ago
What are the 3 types of chemical reactions?
den301095 [7]

Answer:

Synthesis reactions. Decomposition reactions. Combustion reactions.

Explanation:

Synthesis reactions. - Two or more reactants combine to make 1 new product

Decomposition reactions. - A single reactant breaks down to form 2 or more products.

Combustion reactions. - A single element or compound combines with oxygen gas releasing energy. This rapid oxidation is called burning.

4 0
3 years ago
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