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What is the bond angle in a water (H2O) molecule?

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Question: What is the bond angle in a water (H2O) molecule?

Options:

  1. 90 degrees
  2. 104.5 degrees
  3. 120 degrees
  4. 180 degrees

Correct Answer: 104.5 degrees

Solution: 

The bond angle in water is approximately 104.5 degrees due to the repulsion of the two lone pairs.

What is the bond angle in a water (H2O) molecule?

Practice Questions

Q1
What is the bond angle in a water (H2O) molecule?
  1. 90 degrees
  2. 104.5 degrees
  3. 120 degrees
  4. 180 degrees

Questions & Step-by-Step Solutions

What is the bond angle in a water (H2O) molecule?
  • Step 1: Understand that a water molecule (H2O) has two hydrogen atoms and one oxygen atom.
  • Step 2: Know that the oxygen atom has two lone pairs of electrons that are not involved in bonding.
  • Step 3: Recognize that the two hydrogen atoms are bonded to the oxygen atom, forming a V-shape.
  • Step 4: Remember that lone pairs of electrons repel each other and the bonded pairs, affecting the shape of the molecule.
  • Step 5: Learn that the bond angle is the angle between the two hydrogen atoms in the water molecule.
  • Step 6: Conclude that the bond angle in water is approximately 104.5 degrees due to the repulsion from the lone pairs.
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