Concentration of Acid/M				Time taken for the agar block to turn red/sec				Rate of diffusion/sec^-1
0.2									198.74														0.0278
0.4									175.32														0.0315
0.6									118.21														0.0467
0.8									112.33														0.0491
1.0									108.23														0.0510

SA/V = 5.52