What is the general formula for alkynes?

The correct general formula for alkynes is ( C_nH_{2n-2} ). Alkynes are hydrocarbons that contain at least one carbon-carbon triple bond.

In understanding this formula, it is important to recognize that each carbon atom in an alkyne typically forms four bonds. For every triple bond present, two hydrogen atoms are removed from the formula compared to alkanes (which have single bonds) and alkenes (which have double bonds).

To break it down:

• Alkanes follow the formula ( C_nH_{2n+2} ) because they are saturated hydrocarbons with only single bonds, allowing for the maximum number of hydrogen atoms.

• Alkenes have one double bond and thus follow the formula ( C_nH_{2n} ), requiring two fewer hydrogen atoms than alkanes.

• Alkynes, featuring a triple bond, result in ( C_nH_{2n-2} ) which indicates a further reduction of two hydrogen atoms compared to alkenes.

Thus, this formula accurately accounts for the connectivity and bonding structure characteristic of alkynes.