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The change in bond angle as the s - char...

The change in bond angle as the s - character of hybridized orbital decreases is ,

A

Decreases

B

Increases

C

Does not change

D

Become zero

Text Solution

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The correct Answer is:
To solve the question regarding the change in bond angle as the s-character of hybridized orbitals decreases, we will follow these steps: ### Step 1: Understand Hybridization Hybridization involves the mixing of atomic orbitals to form new hybrid orbitals that can accommodate the bonding electrons. The s-character refers to the proportion of s orbital character in these hybrid orbitals. **Hint:** Remember that hybridization can involve different combinations of s and p orbitals, leading to different geometries and bond angles. ### Step 2: Identify the Relationship Between s-character and Bond Angle The bond angle is influenced by the s-character of the hybrid orbitals. As the s-character increases, the bond angle tends to increase. This is because s orbitals are spherical and allow for greater electron density around the nucleus, which leads to increased repulsion between bonding pairs of electrons. **Hint:** Think about how the shape of the orbitals affects the spatial arrangement of electrons. ### Step 3: Analyze Different Types of Hybridization - **sp³ Hybridization:** 25% s-character, bond angle ~109.5° (tetrahedral geometry). - **sp² Hybridization:** 33.3% s-character, bond angle ~120° (trigonal planar geometry). - **sp Hybridization:** 50% s-character, bond angle ~180° (linear geometry). As we see, as the s-character decreases from sp to sp² to sp³, the bond angles also decrease. **Hint:** Create a table to visualize the relationship between hybridization type, s-character, and bond angle. ### Step 4: Conclude the Relationship Since the bond angle is directly proportional to the s-character, if the s-character decreases, the bond angle must also decrease. This means that as we move from sp to sp³ hybridization, the bond angle decreases. **Hint:** Consider how the electron repulsion and spatial arrangement change with varying s-character. ### Final Conclusion Thus, the change in bond angle as the s-character of hybridized orbitals decreases is that the bond angle decreases. **Answer:** The bond angle decreases as the s-character of hybridized orbitals decreases.
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