Advertisements
Advertisements
Question
What do you observe when you drop a few drops of acetic acid to test tubes containing
(a) phenolphthalein
(b) distilled water
(c) universal indicator
(d) sodium hydrogen carbonate powder
Solution
Acetic acid is a weak acid. The following changes occur when a few drops of acetic acid are added to the given solutions:-
(i) Phenolphthalein remains colourless, as acetic acid shows a change in colour in basic substances.
(ii) Acetic acid dissolves in distilled water.
(iii) Acetic acid turns the colour of the universal indicator to pale orange.
(iv) When added to sodium hydrogen carbonate powder, acetic acid causes effervescence because of the evolution of carbon dioxide gas in the process.
CH3COOH(aq) + NaHCO3(s) → CH3COONa(aq) + H2O(l) + CO2(↑)
APPEARS IN
RELATED QUESTIONS
You have four test tubes, A, B, C and D containing sodium carbonate, sodium chloride, lime water and blue litmus solutions respectively. Out of these the material of which test tube/ test tubes would be suitable for the correct test of acetic/ethanoic acid?
(a) only A
(b) A and B
(c) B and C
(d) A and D
Describe a test for carboxylic acid.
The substance which can produce brisk effervescence with baking soda solution is:
(a) ethanol
(b) vegetable oil
(c) vinegar
(d) soap solution(b) hydrocarbon ends directed towards the centre and ionic ends directed outwards
In a soap micelle, the soap molecules are arranged radially with the hydrocarbon ends, i.e. hydrophobic, directed towards the centre; and, ionic ends, i.e. hydrophilic, directed outwards.
Acetic acid is a typical acid. Write one equation in case of its reactions with a base/alkali?
On adding NaHCO3 to acetic acid, a gas is evolved which turns lime water milky due to the formation of:
(1) Calcium bicarbonate
(2) Calcium hydroxide
(3) Calcium carbonate
(4) Calcium acetate
Under what conditions does ethane get converted to ethyl alcohol?
Give reason for the following :
Ethyne is more reactive than ethane
In the presence of the acid catalyst, ethanoic acid reacts with ethanol and ______ ester is produced.
Bubbles are seen in the test tube during the preparation of lime water.
Give the balanced chemical equation of the following reaction:
Neutralization of NaOH with ethanoic acid.
