On a Metabolic Pathways experiment, Describe your observations below (what was the color of the juice before and after mixing carbon dioxide? Can you give any tentative explanation to this?): Solution It is being observed that the juice colour before adding of CO2 will be normal light colour but after adding of CO2 gas the colour will change to Yellow in colour from the original one along with the high amount of buzz formation in the juice.. !! It I due to the formation of more and more acid in the juice whre the CO2 reacts with the juice water content to form acid.. More acid means more colour change with buzz formation..!!.