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yawa3891 [41]
3 years ago
11

How many grams of CaCl, are in 250 mL of 2.0 M CaCl ?

Chemistry
1 answer:
stellarik [79]3 years ago
6 0

Answer: 55 g CaCl2 hope this helps

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Consider a redox reaction for which E∘ is a negative number. Part A What is the sign of ΔG∘ for the reaction? What is the sign o
Vsevolod [243]

Answer:

a) ΔG∘ > 0

b) K < 1

c) The electrochemical cell based on this reaction cannot accomplish work on its surroundings.

Explanation:

The Gibb's free energy, ΔG∘, is related to the potential of the cell, E∘ through

ΔG∘ = -nFE∘

where n = number of electrons being gained or lost in the electric cell

F = Amount of Faraday's electricity

a) If E∘ < 0, that is, negative,

ΔG∘ = positive (Since n and F cannot be negative)

That is, ΔG∘ > 0

b) Will the equilibrium constant for the reaction be larger or smaller than 1?

The Gibb's free energy is also related to the equilibrium constant through

ΔG∘ = - nRT In K

where n = number of moles = always positive

R = molar gas constant = always positive

T = absolute temperature in Kelvin = almost always positive too.

Recall that ΔG∘ > 0, that is positive too,

Hence,

- nRT In K = ΔG∘

In K = -(ΔG∘/nRT)

Since all of the quantities on the right hand side are positive parameters,

In K = a negative number

Meaning that K is less than 1.

The equilibrium constant is less than 1.

K < 1

c) Can an electrochemical cell based on this reaction accomplish work on its surroundings?

The Gibb's free energy determines spontaneity.

A process with a negative Gibb's free energy is said to be spontaneous and gives off the free energy as the process proceeds.

A process with a positive Gibb's free energy is said to be non-spontaneous. This one cannot give free energy (work) out to the environment.

For this question, the Gibb's free energy is positive, hence, the electrochemical cell based on this reaction cannot accomplish work on its surroundings.

Hope this Helps!!!

6 0
3 years ago
A cactus needle is a structure made of different tissues that work together to protect the plant from animals that might want to
Nezavi [6.7K]
Organ, it’s made of tissue, and also it’s out
6 0
3 years ago
Read 2 more answers
A heterogeneous mixture is one that has a completely uniform composition. true or fasle
MAXImum [283]
The answer to this question is False
3 0
3 years ago
A red blood cell is placed into each of the following solutions. Indicate whether crenation, hemolysis, or neither will occur. S
madam [21]

Answer:

A. The cell will undergo crenation

B. The cell will undergo hemolysis

C. The cell will undergo hemolysis

D. The cell will undergo crenation.

E. The cell will undergo neither crenation nor hemolysis

Explanation:

A hypotonic solution is a solution in which the concentration of solutes is greater inside the cell than outside the cell.

A hypertonic solution is a solution in which the concentration of solutes is greater outside the cell than inside the cell.

An isotonic solution is a solution in which the concentration of solution is the same outside and inside of the cell. A solution with 5% (m/v) glucose and 0.9% (m/v) NaCl is an isotonic solution.

When a red blood cell is placed in a hypotonic solution, it will swell and burst. This is known as hemolysis.

When placed in a hypertonic solution, a red blood cell will lose water and shrivel. This is is known as cremation.

When a red blood cell is placed in an isotonic solution, neither hemolysis or crenation occurs as there is no net movement of water across the cell's membrane.

A: 3.75 % (m/v) NaCl Solution is a hypertonic solution. The cell will undergo crenation

B: 1.92 % (m/v) glucose Solution is hypotonic. The cell will undergo hemolysis

C: Distilled H2O Solution is a hypotonic solution. The cell will undergo hemolysis

D: 9.03 % (m/v) glucose Solution is a hypertonic solution. The cell will undergo crenation

E: 5.0% (m/v) glucose and 0.9% (m/v) NaCl are both isotonic solutions. The cell will undergo neither hemolysis not crenation.

7 0
3 years ago
How do you answer #5?
GenaCL600 [577]

Answer:

Percentage Yield is calculated by doing -> experimental/theoretical x 100% = percentage yield.

I THINK that if your questions are connected it should be 14/16.89 x 100% = 82.889%

Explanation:

5 0
3 years ago
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