Question

a leaf tapped between
Two slides. Under each slide is a piece of cobalt chloride
paper. This paper turns pink when water touches it. Explain
why the paper on the bottom of the leaf turns pink before
the paper on the top of the leaf.​

Answer 1

Explanation:

Cobalt chloride paper is used to test for the presence of water leaking through tiny cracks in pipes or porcelain. When water is present, the test paper goes from blue to pink.As humidity increases, cobalt chloride changes colour from sky blue to purple to pink