CHEMISTRY #6 ⭐️ Module 5

Alkanes, Alkenes & Alkynes

Alkane

ONLY single bonds. Ending = -ane.

Alkene

Has a double bond. Ending = -ene.

Alkyne

Has a triple bond. Ending = -yne

Alkane formula

CₙH₂ₙ₊₂

• C = Carbon

• H = Hydrogen

• n = number of carbon atoms

• 2n + 2 = number of hydrogen atoms

Alkene formula

CₙH₂ₙ

• Contains carbon + hydrogen

• Has at least one double bond (C=C)

• Ending = -ene

Alkyne formula

CₙH₂ₙ₋₂

• Has at least one triple bond (C≡C)

• Ending = -yne

Saturated

Only single C–C bonds.

Unsaturated

Has double or triple C–C bonds.

Which one is C₃H₈????

C₃H₈→CₙH₂ₙ₊₂

If you have C₆:

• C₆H₁₄ → Alkane (+2)

• C₆H₁₂ → Alkene (same ×2)

• C₆H₁₀ → Alkyne (−2)?

Alkane (single bonds)

Which one is C₄H₈????

C₄H₈ → CₙH₂ₙ

If you have C₄:

• C₄H₁₀ → Alkane (+2)

• C₄H₈ → Alkene (same ×2)

• C₄H₆ → Alkyne (−2)

Alkene (double bond)

Which one is C₅H₈????

C₅H₈ → CₙH₂ₙ₋₂

If you have C₅:

• C₅H₁₂ → Alkane (+2)

• C₅H₁₀ → Alkene (same ×2)

• C₅H₈ → Alkyne (−2)

Alkyne (triple bond)