What is oleum formula?

(1) Oleum can be represented by the formulaySO₃.H₂O where y is the total molar sulphur trioxide content .the value of y can be varied to different Oleum sample.
(2) Oleum also be expressed  as H₂SO₄.xSO3where x is molar free suphur trioxide.
(3) Oleum is the solution of of sulphur trioxide in sulphuric acid , it is also known as  fuming sulphuric acid or Pyrosulphuric acid(H₂S₂O₇=H₂SO₄+SO₃).
(4) Oleum sample contain two type of SO₃.

(i) Free SO3:- It is that SO₃ which combined with water water to give H₂SO₄ .

(ii) Combined SO3:- The SO₃ which is present in H₂SO₄ itself is known as combined SO₃ and it does not react with water.

What is Oleum ?

1) Oleum can be represented by the formulaySO₃.H₂O where y is the total molar sulphur trioxide content .the value of y can be varied to different Oleum sample.
(2) Oleum also be expressed  as H₂SO₄.xSO3where x is molar free suphur trioxide.
(3) Oleum is the solution of of sulphur trioxide in sulphuric acid , it is also known as  fuming sulphuric acid or Pyrosulphuric acid(H₂S₂O₇=H₂SO₄+SO₃).
(4) Oleum sample contain two type of SO₃.

(i) Free SO3:- It is that SO₃ which combined with water water to give H₂SO₄ .

(ii) Combined SO3:- The SO₃ which is present in H₂SO₄ itself is known as combined SO₃ and it does not react with water.

Why dipole moment of CO2 is why?

The structure of CO₂ is this is a highly symmetrical structure with a plane of symmetry passing through the carbon. The bond dipole of C–O is directed towards oxygen as it is the negative end. Here two equal dipoles acting in opposite direction cancel each other and therefore the dipole moment is zero.

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Why dipole moment of H2O greater thna F2O ?

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Let’s draw the structure of both two compounds and then analyses it.

                                

In both H₂O and F₂O the structure is quite the same. In H₂O as O is more electronegative than hydrogen so the resultant bond dipole is towards O, which means both the lone pair and bond pair dipole are acting in the same direction and dipole moment of H₂O is high. In case of F₂O the bond dipole is acting towards fluorine, so in F₂O the lone pair and bond pair dipole are acting in opposition resulting in a low dipole

Related Questions:

Although electron affinity of chlorine is higher than fluorine, yet fluorine act as better oxidizing agent than chlorine? Explain.

Why chlorine trifluoride (ClF3) exists but fluorine trichloride (FCl3) does not?

Why Chlorine (Cl2) bleaches a substance permanently but sulphuredioxide (SO2) does it temporarily?

What is the correct order of electronegativity of Cl atoms in HClO, HClO2, HClO3 and HClO4 ?

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Which of the following is a strongest acid among oxy acids of chlorine and why? "HClO, HClO2, HClO3, HClO4"

How many maximum atoms of IF7 are present in the same plane ?

Number of lone pair present at central atom of I3- ion and also give hybridisation and shape of ion?

Why polarity of Ammonia (NH3) is more than NF3 ?

 

Related Questions:

Although electron affinity of chlorine is higher than fluorine, yet fluorine act as better oxidizing agent than chlorine? Explain.

Why chlorine trifluoride (ClF3) exists but fluorine trichloride (FCl3) does not?

Why Chlorine (Cl2) bleaches a substance permanently but sulphuredioxide (SO2) does it temporarily?

What is the correct order of electronegativity of Cl atoms in HClO, HClO2, HClO3 and HClO4 ?

How does the thermal stability of oxy acids of chlorine increase with an increase in the oxidation state of chlorine atom ?

Which of the following is a strongest acid among oxy acids of chlorine and why? "HClO, HClO2, HClO3, HClO4"

Which will have very fast tendency to dimerized ClO2 or NO and why?

How does the thermal stability of oxyacids of chlorine increase with an increase in the oxidation state of chlorine atom ?

Which of the following is a strongest acid among oxy acids of chlorine and why? "HClO, HClO2, HClO3, HClO4"

How many maximum atoms of IF7 are present in the same plane ?

Number of lone pair present at central atom of I3- ion and also give hybridisation and shape of ion?