Why bond angle in H2O is nearly 104.5 but that in H2S It is nearly 90?

Bond angle is directly proportional to electronegativity of central atom. as electronegativity of O is more than S so bond angle of H2O more than H2S. Due to more electronegativity of oxygen electron cloud shift towards it and this lead to increase in b.p-b.p repulsion. But in H2S the bond angle is around 92 degrees.

Why water does not show its expected bond angle of 109.5 degree although it shows sp3 hybridisation?

The observed H-O-H bond angle in water (104.5°) is less than the tetrahedral angle (109.5°); one explanation for this is that the non-bonding electrons tend to remain closer to the central atom and thus exert greater repulsion on the other orbitals, pushing the two bonding orbitals closer together.

Why does H2O have the smallest bond angle?

One lone pair. Because we have a lone pair, the bond angle again will be less than 195 But here, this one has two lone pairs on it. The water, so it’s bond angle should be even lower because, remember, the more lone pairs you have, the more compresses your bond angle. So far, water has the smallest bond angle.

Why is the bond angle of H2O 104.5 O NOT 109.5 O like in the tetrahedral model?

If we consider only Coulomb repulsion among six oxygen valence electrons, they form octahedral structure, so H2O bond angle is close to 90 degree. But is isn’t. This is due to electron’s “de Broglie wave interference”.

Why H2O and H2S have different bond angles?

Bond angle is directly proportional to electronegativity of central atom. as electronegativity of O is more than S so bond angle of H2O more than H2S. Due to more electronegativity of oxygen electron cloud shift towards it and this lead to increase in b.p-b.p repulsion.

Why H2S has lower bond angle than H2O?

Sulfur bonds through valence orbitals that are 3s and 3p instead of 2s and 2p. Because p orbitals have angles between them of 90 deg, this tends to reduce bond angles. Hydrogen sulfide thus has a narrower bond angle than water.

What is bond angle of H2O in H2O molecule?

Water (H. 2O) is a simple triatomic bent molecule with C2v molecular symmetry and bond angle of 104.5° between the central oxygen atom and the hydrogen atoms.

Why is H2O sp3 hybridized?

H2O has a tetrahedral arrangement of the electron pairs about the O atom that requires sp3 hybridization. Two of the four sp3 hybrid orbitals are used to form bonds to the two hydrogen atoms, and the other two sp3 hybrid orbitals hold the two lone pairs on oxygen.

Why does h2s have a smaller bond angle than H2O?

The answer is that, with increasing principle quantum number, the energy separation between s and p orbitals increases, so that bond orbitals tend to involve more p character and less s character. Hydrogen sulfide thus has a narrower bond angle than water.

Why does water have a bond angle of 105?

Because each water molecule has its hydrogen atoms about 105 degrees apart, and because these hydrogen atoms are attracted to the oxygen of other water molecules, a crystal begins to form. The water molecules within the crystal are attracted to other water molecules, but only at very precise angles.

Why does the bond angle go from 104.5 to 109.5 when water freezes to form ice?

Despite being sp3 hybridised, due to lone pair – lone pair repulsion, tetrahedral angle would be reduced and as a result we get an angle of 104.5 degree. This repulsion also leads to bent shape of water Molecule instead of tetrahedral shape. Hope this helps.

Why bond angle of H2O is greater than OF2?

O is more electronegative than H and so bond pairs in OH2 will be more towards O, whereas since F is more electronegative than O, so bond pairs in OF2 is more towards F and therefore OF2 face a lesser bp-bp repulsion than OH2. This justifies the higher bond angle of OH2 over OF2.

Why is the hybridization of H2O SP3?

Thus, hybridization is sp3. Since it has only 1 lone pair so due to replusion between lone pair and bond pair the bond angle also reduces (107°) But, if we compare both of them together so in case of H20 there are 2 lone pair and the lone pair-lone pair repulsion is greater than the bond pair-bond pair repulsion so the bond angle reduces much mo

What is the bond angle of H2O hybridization?

Hybridization of H2O molecule is Sp³. So the bond angle should be 109°8′ but it is 104.5° because it has two lone pair and two bond pair. Due to lone pair $ bond pair repulsion it occupy such a position to lessen the repulsive interaction.

What is the angle between the orbitals in sp2 hybridization?

The geometry of the orbital arrangement: Linear: Two electron groups involved resulting in sp hybridization, the angle between the orbitals is 180°. Trigonal planar: Three electron groups involved resulting in sp2 hybridization, the angle between the orbitals is 120°.

What is the bond angle in NH3 and H2O?

For example : NH3 and H2O have the same hybridization but in ammonia there is one lone pair is present on Nitrogen atom whereas in H2O two lone pair are present on oxygen atom,so bond angle in ammonia is grater then water molecule.