Finding attractive force between two ions, using Coulombs equation

In summary, the question is asking to calculate the force of attraction between a K+ and an O2- ion, which can be done using the formula F = [k(Z1)(Z2)] / r^2. The valences and shells of the ions are not relevant, as they are still charged particles.
  • #1
SlothNast
6
0

Homework Statement



"Calculate the force of attraction between a K +
and an O 2- ion whose centers are separated
by a distance of 1.5 nm."




Homework Equations



F = [ k (Z1)(Z2) ] / r^2

The Attempt at a Solution



Both valences are filled when K is a + charge and O is a 2- charge. My main problem is I don't know what to use for "Z". I would just use 1 and -2, but the shells are filled and maybe there isn't much attraction at all?

Any help is greatly appreciated, thanks!
Henry
 
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  • #2
You have two IONS - one has charge +1, the other -2. Valences, shells don't matter.
 
  • #3
You have the charges, you have the distances, and that's what the formula asks for. Just because these are atomic-level particles doesn't mean squat - they are charged particles. Use the formula.
 

1. What is Coulomb's equation?

Coulomb's equation is a mathematical formula that calculates the electric force between two charged particles, such as ions. It states that the force is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.

2. How do you find the attractive force between two ions?

To find the attractive force between two ions, you can use Coulomb's equation, which is F = k * (q1 * q2)/d^2, where F is the force in Newtons, k is the Coulomb's constant (9 x 10^9 N*m^2/C^2), q1 and q2 are the charges of the two ions in Coulombs, and d is the distance between them in meters.

3. Can Coulomb's equation be used for any type of charged particles?

Yes, Coulomb's equation can be used for any type of charged particles, including ions, protons, electrons, and other subatomic particles. It is a fundamental law in electromagnetism that applies to all charged particles.

4. How does the distance between two ions affect the attractive force?

The distance between two ions has a significant effect on the attractive force between them. As the distance decreases, the force increases exponentially, meaning that the closer the ions are, the stronger the attractive force between them will be. On the other hand, as the distance increases, the force decreases.

5. What is the significance of finding the attractive force between two ions?

Finding the attractive force between two ions is essential in understanding the behavior of charged particles in various systems, such as in chemical reactions, electrolytic cells, and plasma. It also helps in predicting the stability and interactions between ions in different environments, such as in solutions or in the atmosphere.

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