Carbon dioxide in the atmosphere can be reduced by _.*
2 answers:
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Answer:
2-propanol
Explanation:
From the given information
2 drops of an unknown sample were said to be placed in a test tube followed by the addition of 2 ml of ethanol then gentle mixing. They then initiate a further addition of 2 drops of potassium permanganate reagent (KMNO₄) to the test tube and mixed the contents of the test tube thoroughly. After adding 2 drops of potassium permanganate reagent, the reagent oxidizes the secondary alcohols(2-propanol) to ketone(i.e acetone) and no further reaction will take place since there are no reactive C-H bonds left. The diagram attached below shows how the reaction proceeds.
Answer : The volume of water needed to recrystallize 0.900 g of benzoic acid is 13.24 mL.
Explanation :
For the complete recrystalization, the amount of hot water should be such that, the benzoic acid is completely soluble in it.
As we are given that the solubility of benzoic acid in hot water is 68.0 g/L. Now we have to determine the volume of water is needed to recrystallize 0.900 g of benzoic acid.
From this we conclude that,
As, 68.0 grams of benzoic acid soluble in 1 L of water.
So, 0.900 grams of benzoic acid soluble in of water.
The volume of water needed = 0.01324 L = 13.24 mL
conversion used : (1 L = 1000 mL)
Therefore, the volume of water needed to recrystallize 0.900 g of benzoic acid is 13.24 mL.