How To Find The Number of Hydrogen Atoms Given The Index of Hydrogen Deficiency | Summary and Q&A

TL;DR

Calculate the number of hydrogen atoms in a hydrocarbon using the formula: 2n + 2 - (ihd/2).

Key Insights

• 😋 Saturated hydrocarbons (alkanes) have an IHF of 0, indicating no multiple bonds or rings.
• 🫀 The formula to calculate the number of hydrogen atoms is 2n + 2 - (ihd/2).
• 👻 The IHF formula allows for a simpler calculation of hydrogen atoms compared to other methods.
• 😋 Unsaturated hydrocarbons have an IHF greater than 0, indicating the presence of multiple bonds or rings.
• 🫀 The IHF formula is applicable for calculating hydrogen atoms in both saturated and unsaturated hydrocarbons.
• 🫀 Hydrocarbons consist of only carbon and hydrogen atoms.

Transcript

49 how many hydrogen atoms are present in the saturated hydrocarbon with 15 carbon atoms what's your answer to that question what is the ihd of a saturated hydrocarbon a saturated hydrocarbon is basically an alkane there's no double bonds there's no triple bonds there's no rings so the ihd is zero so we could use the ihd formula to calculate the nu... Read More

Questions & Answers

Q: How do you calculate the number of hydrogen atoms in a saturated hydrocarbon with 15 carbon atoms?

The IHF for saturated hydrocarbons is 0. Using the formula 2n + 2 - (ihd/2), we get 2 * 15 + 2 - 0 = 32 hydrogen atoms.

Q: What is the formula to calculate the number of hydrogen atoms in a hydrocarbon?

The formula is 2n + 2 - (ihd/2), where n is the number of carbon atoms and ihd is the index of hydrogen deficiency.

Q: How do you calculate the number of hydrogen atoms in an unsaturated hydrocarbon with 18 carbon atoms and an IHF of 4?

Using the formula 2n + 2 - (ihd/2) and substituting n = 18 and ihd = 4, we get 2 * 18 + 2 - (4/2) = 30 hydrogen atoms.

Q: What is IHF in the context of hydrocarbons?

IHF stands for the index of hydrogen deficiency, which indicates the number of multiple bonds or rings in a hydrocarbon. It is used to calculate the number of hydrogen atoms.

Summary & Key Takeaways

• For a saturated hydrocarbon with 15 carbon atoms, the IHF is 0, resulting in 32 hydrogen atoms.

• The formula to calculate the number of hydrogen atoms is 2n + 2 - (ihd/2).

• For an unsaturated hydrocarbon with 18 carbon atoms and an IHF of 4, the calculation yields 30 hydrogen atoms.