CHEMISTRY! I need help for this experiment as well.. What is the observation for that both on the table?

Solid oxalic acid - color of the blue litmus paper does not change. It is blue.

Solid oxalic acid + water - color of the blue litmus paper changes.  It became red.

Explanation:

Because no free H+ - ions in solid oxalic acid, the blue litmus paper will not change color. It will stay blue.

Solid oxalic acid + water - free H+ - ions is formed, color of the blue litmus paper changes.  It became red.

it id the first and last option

answer; i do believe that the correct answer is ; ///are valued more highly than their cost;