Question

the molecular formula of the first member of certain group of organic organic compounds is CH2O(HCHO). determine the name and the molecular formula of third member of this group if the members of this group are in homologous series. what is the general name for this group of organic compounds?

Answer 1

In organic chemistry, a homologous series is a series of compounds with the same functional group and similar chemical properties. This can be the length of a carbon chain, .

Answer 2

Answer: The name and the molecular formula of third member of this group if the members of this group are in homologous series is butanoic acid and $CH_3CH_2CH_2COOH$ respectively. The general name for this class of compounds is carboxylic acid.

Explanation: The given formula is $C_2H_4O_2$ which can be written as $CH_3COOH$. Thus the given compound is ethanoic acid and the general name for this class of compounds is carboxylic acid which contains functional group of $-COOH$.

Homologous series is a series of compounds with the same functional group and similar chemical properties but they differ from each other by a $-CH_2$ group.

Thus the second member will be $CH_3CH_2COOH$ and the third member will be $CH_3CH_2CH_2COOH$ which contains four carbons and hence the IUPAC name is butanoic acid.