A hydroxide ion (OH−) in a glass of water has an average speed of about 600 m/s.

Question

Determine the magnitude of the electrical force between the hydroxide ion (charge -e) and a positive ion (charge +e) that is 1.0×10−8 m away (about the separation of 30 atoms).

Answer 1

What is k q1q2/distance^2. q1=1.6*10^-19, q2=same (ignore signs). distance^2=1e-16

force=2.3e-28/1e-16=2.3e-12N