A green plant such as pelargonium supplied with a strictly mineral liquid is exposed to an air draft
that traverses a solution of sodium bicarbonate
(NaHCO3) labelled by radioactive carbon "C. Few
drops of phenolphthalein are added.
Phenolphthalein becomes dark pink in a basic
medium. The chemical reaction liberating carbon
dioxide is represented below:
CO2
(3)
2NaHCO3 - Na2CO3 + CO2 (g) + H2O
Ds) and few drops
Chi loves
how can you explain the change in color of phenolphthalein into dark pink?

type 2 happens when excess consumption of high-sugar foods flood the blood supply with glucose and reduce the production and effectiveness of insulin. if a person has prediabetes, they can reduce the risk of full diabetes through regular exercise and a balanced, low-sugar diet.

the truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey.