Question

(new question) Geno weighed a young willow plant five years ago and planted it in a pot containing a known mass of soil. He watered the plant everyday with tap water. After five years, he weighed the willow tree and the soil again. He found that there was very little change in the mass of the soil but the willow tree had become three times heavier. If Geno had watered the tree with only distilled water, he would have failed his experiment. What would happen to the tree if he had done so? Explain your answer.