Steric Number and Molecular Geometry

The video tutorial explains how to find the steric number for the central sulfur atom in sulfuric acid (H2SO4). It begins with the importance of having a valid Lewis structure for H2SO4. The tutorial then details the process of counting the atoms bonded to sulfur and notes the absence of lone pairs on the sulfur atom. Finally, it uses the steric number to determine the molecular geometry of H2SO4, concluding that it is tetrahedral.

What is the first step in finding the steric number for the central atom in H2SO4?

• Identify the molecular geometry.

• Determine the hybridization of the central atom.

• Count the lone pairs on the central atom.

• Draw a valid Lewis structure.

How many atoms are bonded to the central sulfur atom in H2SO4?

• Two

• Five

• Four

• Three

What is the significance of lone pairs in determining the steric number?

• They have no effect on the steric number.

• They are only considered in hybridization.

• They decrease the steric number.

• They increase the steric number.

What is the steric number for the central sulfur atom in H2SO4?

• Two

• Three

• Five

• Four

How does the steric number help in determining the molecular geometry?

• It helps predict the shape of the molecule.

• It identifies the type of bonds present.

• It determines the bond angles.

• It indicates the number of lone pairs.

Why are there no lone pairs on the central sulfur atom in H2SO4?

• Lone pairs are only present in oxygen.

• Sulfur cannot have lone pairs.

• All electrons are involved in bonding.

• Hydrogen atoms prevent lone pairs.

What is the molecular geometry of H2SO4 based on the steric number?

• Trigonal planar

• Bent

• Linear

• Tetrahedral

What role does the absence of lone pairs play in the molecular geometry of H2SO4?

• It causes the molecule to be bent.

• It has no effect on the shape.

• It makes the molecule linear.

• It results in a tetrahedral shape.