Do any of the pigments change color when heated for a long period ...

[chads108]

Do any of the pigments change color when heated for a long period of time? Which? Explain the reaction.

Question 2

Compare the colors of the vegetables used when cooked in acid and alkaline cooking water. Which are the predominant pigments in these vegetables?

[ApricotDream]

Answer to Question 1

Red cabbage changed to a dark blue after being cooked for about 25 minutes. Also, cooking the cauliflower for a long time turned it a pink color.

Answer to Question 2

When acid was added to broccoli, it turned brown. When a base was added, the broccoli turned bright green, but became mushy in texture. The predominant pigment in broccoli is chlorophyll. When acid was added to carrots, they turned a bright orange, but when a base was added, they turned a dark orange; the pigment in carrots is beta-carotene. When acid was added to red cabbage, it turned a purple shade, and when a base was added it turned a green/blue shade; the pigment in red cabbage is anthocyanin. When an acid was added to cauliflower, it stayed white, and it turned yellow when a base was added; the predominant pigment in cauliflower is anthoxanthin.

[chads108]

Both answers were spot on, thank you once again

[ApricotDream]

Great! Please up vote