The pH of normal rainwater is 5.6. It's slightly acidic
5mg in liter is 5 ppm
Explanation: 1 ppm is one part per million.
1 ppm is 1 mg is one part of million from 1 kg = 1000 000 mg
1 litre water is 1. Kg.
Cobalt sulphate is the usual source of water-soluble cobalt since it is the most economical salt and shows less tendency to deliquesce or dehydrate
Kinetic Molecular Theory states that gas particles are in constant motion and exhibit perfectly elastic collisions.
