Question

for tap water and a clean glass the angle of contact is ? can u help me ​

Answer 1

The angle of contact between pure water and glass is found to be 00 as both cohesive forces and adhesive forces are equal. But due to presence of ions in tap water the angle of contact is acute from 80 to 180.

Answer 2

Answer:

Forces are observed to be equal in this case, which becomes a necessary condition for the angle of contact to be zero degrees. Therefore, for tap water and clean glass, the angle of contact is zero degree.