Question

What is the formulae for ESTER
Class 10

Answer 1

Answer:

Explanation:Esters are the compounds of general formula RCOORˈ, formed by the reaction of carboxylic acids with alcohols. RCOOH + RˈOH → RCOORˈ (ester) + H₂O They posses sweet odour so, that they are used in cosmetics. Ex: Reaction of ethanoic acid with ethyl alcohol produces ethyl acetate. Formation of ethyl acetate (ester) indicates sweet smell. CH₃COOH + C₂H₅OH →CH₃COOC₂H₅ + H₂O

Answer 2

$RCOOH + R'OH$ → $RCOOR' (ester) + H_2O$

Explanation:

Esters are the compound with sweet odor (used in cosmetics), derived from carboxylic acids ($-COOH$ group), that is by replacement of hydrogen atom from carboxylic group by a hydrocarbon group (an $alkyl$ group - methyl or ethyl, or a $phenyl$ group)

Therefore, the general formula of Esters are $RCOOR'$

These can be formed by the reaction of carboxylic acids and alcohols.

The reaction is as follows -

$RCOOH + R'OH$ → $RCOOR' (ester) + H_2O$

Example:

Ethan-oic acid reacts with ethyl alcohol to give an ester that is ethyl acetate (sweet smell)

$CH_3COOH + C_2H_5OH$ → $CH_3COOC_2H_5 + H_2O$