You have four bottles labeled 1, 2, 3, 4. Each bottle has a white powder in it. The identities of the substances are held secret
by the teacher. Mr. Sandstone wants you to try and experiment with the substances to figure out what they are. You add vinegar, a weak acid, to each white substance. The results are in the table provided. Which substance is likely to be baking soda (sodium bicarbonate)?
In general, roots absorb phosphorus in the form of orthophosphate, but can also absorb certain forms of organic phosphorus. Phosphorus moves to the root surface through diffusion.
