Force of Attraction between two ions?

In summary, the force of attraction between two ions is an electrostatic force that is responsible for holding them together in an ionic bond. This force can be calculated using Coulomb's Law and is affected by the charges of the ions, distance between them, and the medium in which they are located. It is typically stronger than the force of attraction between two atoms due to the greater charge difference and likelihood to form ionic bonds. This force can be weakened or broken by adding energy, but can also be regained if the energy is removed.
  • #1
Saladsamurai
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7

Homework Statement


Calculate the force of attraction between Ca2+ and O2- ions whose centers are separated by 1.25 nm.

The Attempt at a Solution

Well, I believe this is a matter of electrostatic force (Coulomb's Law)...but I am not sure what to use for the values of q1 and q2
Is it just the elementary charge multiplied by 2 for each ion (since they both have a net charge of 2)?

Is this the right idea?
 
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  • #2
Yes.
 
  • #3


Yes, you are on the right track. The force of attraction between two ions can be calculated using Coulomb's Law, which states that the force between two charged particles is directly proportional to the product of their charges and inversely proportional to the square of the distance between their centers.

In this case, the charges of the Ca2+ and O2- ions would be represented as q1 and q2, respectively. As you mentioned, the elementary charge can be used as a reference point for these values. Since both ions have a net charge of 2, the values of q1 and q2 would be 2e and -2e, respectively.

Using this information, you can plug in the values into the formula for Coulomb's Law: F = k(q1q2)/d^2, where k is the Coulomb's constant (8.99 x 10^9 Nm^2/C^2) and d is the distance between the ions (1.25 nm).

After plugging in the values, you can solve for the force of attraction between the two ions. Keep in mind that the force will be attractive since the ions have opposite charges.

I hope this helps!
 

1. What is the force of attraction between two ions?

The force of attraction between two ions is an electrostatic force that exists between positively and negatively charged ions. This force is responsible for holding the ions together in an ionic bond.

2. How is the force of attraction between two ions calculated?

The force of attraction between two ions can be calculated using Coulomb's Law, which states that the force is directly proportional to the product of the charges of the ions and inversely proportional to the square of the distance between them.

3. What factors affect the force of attraction between two ions?

The force of attraction between two ions is affected by the magnitude of the charges of the ions, the distance between them, and the dielectric constant of the medium in which they are located.

4. How does the force of attraction between two ions differ from the force of attraction between two atoms?

The force of attraction between two ions is typically stronger than the force of attraction between two atoms. This is because ions have a greater charge difference and are more likely to form ionic bonds, which are stronger than covalent bonds.

5. Can the force of attraction between two ions be broken?

The force of attraction between two ions can be weakened or broken by adding energy, such as heat or electricity. This can cause the ions to separate and form a solution. However, the force of attraction can also be regained if the energy is removed and the ions come back into close proximity.

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