"you are required to plan an invetigation to find out if there is a relationship between cell size & diffusion
(cells of agar made with sodium carbonate & containing phenopthalein (a ph indicator change colour when they are placed into a dilute acid. as the acid diffuses through the block, the ph changes & the pink colour of the indicator dissapears
your planning must be based on the assumption that you are provided with the following:
*blocks of agar
*a ph indicator (may be cut to size)
*supply of 2M hydrochloric
*your scools labs resouces
any help appreciated!!!