Question

Class - VII
TS_General Science Study Material
solution?
What changes occur when carbondioxide is released into phenophthalein
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Answer 1

Answer:

As the concrete reacts with carbon dioxide in the atmosphere, pH decreases to 8.5-9. When a 1% phenolphthalein solution is applied to normal concrete, it turns bright pink. However, if it remains colorless, it shows that the concrete has undergone carbonation.

Explanation:

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Answer 2

Answer:

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Explanation:

As the concrete reacts with carbon dioxide in the atmosphere, pH decreases to 8.5-9. When a 1% phenolphthalein solution is applied to normal concrete, it turns bright pink. However, if it remains colorless, it shows that the concrete has undergone carbonation.