Question
(i) Why did the pH decrease in both investigations? liii (ii) Bile helps lipase to digest fat. What evidence is there in the graph to support this conclusion? __ ( iii Suggest one reason why the contents of both beakers had the sa end of the investigations. __
Answer
4.1
(253 Votes)
Rhiannon
Master · Tutor for 5 years
Answer
(i) The pH decreased in both investigations due to the production of more acidic by-products as a result of the enzymatic digestion process.(ii) Without seeing the graph, it's a bit difficult to definitively identify a specific piece of evidence, but typically, data showing an increase in fat breakdown in the presence of bile would support this conclusion.(iii) Without further information regarding the specifics of these investigations, it could either be guessed that both beakers held a balance between acidic and neutral, or they both finished the same components after complete digestion, leading to a same resultant pH.
Explanation
(i) The pH value can decrease in an investigation due to the production of more acidic substances. In the context of a digestion investigation, when enzymes such as amylase, protease or lipase act upon their substrates, they can result in the release of acidic residues or by-products, which decreases the pH.(ii) Any evidence from the graph highlighting an increased rate of lipids or fats breakdown, or a corresponding decrease in the size of fat globules in presence of bile would support the conclusion. Bile works as an emulsifier, breaking down fat globules to increase surface area, enabling lipase to act more efficiently on fat molecules.(iii)The content of both investigations having the same pH value at the end could be due to a balance reached equilibrium between the acidic products resulting from digestion and neutral four-blanked ones depending on what inputs were in the beakers. However, without further detailed information or the accompanying graph mentioned in the question, one can only speculate on the precise reason.