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Question
If you take a pinch of sodium hydrogen carbonate powder in a test-tube and add drop-by-drop acetic acid to it, what would you observe immediately? List any two main observations.
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Solution
When sodium hydrogen carbonate is added to a flask containing acetic acid, the two observations noted are as follows:
(i) Brisk effervescence is seen because of CO2 gas escaping out from the reaction mixture. The gas turns lime water milky.
(ii) Some amount of heat is evolved during the reaction.
Reactions:\[{NaHCO}_3 + {CH}_3 COOH \to {CH}_3 COONa + {CO}_2 \uparrow + H_2 O\]
\[Ca \left( OH \right)_2 + {CO}_2 \to {CaCO}_3 + H_2 O\]
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RELATED QUESTIONS
When you add about 2 ml of acetic acid to a test tube containing an equal amount of distilled water and leave the test tube to settle after shaking its contents, what will you observe in the test tube after about 5 minutes?
(A) A white precipitate settling at its bottom
(B) A clear colourless solution
(C) A layer of water over the layer of acetic acid
(D) A layer of acetic acid over the layer of water
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The distinctive reaction that takes place when ethanol is treated with acetic acid.
Describe a test for carboxylic acid.
Name one chemical compound which can be used to distinguish between ethanol and ethanoic acid.
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Name the product formed and give the appropriate chemical equation for the following:
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(A) It turns blue litmus red and smells like vinegar
(B) It turns blue litmus red and smells like burning sulphur
(C) It turns res litmus blue and smells like vinegar
(D) It turns red litmus blue and has a fruity smell
Write balanced euation for the following :
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