Ion and polar bond questions?
I need some help with these questions:
1. Is it true that ions do not form polar bonds?
2. Is it true that in a polar covalent bond the atoms have large electrical charges?
3. Is it true that substances composed of polar molecules tend to have lower boiling points than substances composed of nonpolar molecules?
Answer:
1. It depends on what type of ion, but in absolute sense, it is FALSE, many ions from polar bonds. Take carbonate ion for example. The oxygen atoms pull e- forming polar bonds between C-O.
2. This is relative. More information is needed. The question is like asking "Is a House big?" The answer will depend on what you are comparing the electrical charge with.
But if I had to deal with what is just given in your question, I would guess FALSE. Polar covalent bonds have partcial charges.
3. In general, TRUE. Polar molecules have higher boiling points than nonpolar. But when the molecules get really long or big (in certain shapes) the induced dipole (London force) may get much greater than what is expected from smaller molecules, giving them higher boiling points than comparative polar molecule of similar molar mass in some cases.
1)true
2)False
3)Depends upon bond enthalpy
Lancenigo di Villorba (TV), Italy
I read the preceeding answers and I THINK THERE COULD BE SOME MISTAKEs.
I have to send you my answer.
QUESTION.1
FALSE.
You wrote :"Is it true that ions do not form polar bonds?".
As you know, several Polar Solvents result able to dissolve Ionic Compounds, e.g. ITS OWN IONs UNDERGO EFFECTIVELY SOLVATATION.
In this fashion, I shown you a common example where POLAR SOLVENTs MAY BIND IONs BY MEANS OF POLAR BONDs.
QUESTION.2
SOMETIMES, IT MAY BE TRUE.
You wrote :"Is it true that in a polar covalent bond the atoms have large electrical charges?".
As you know, several Polar Covalent Bonds are COVALENT BONDs CHARACTERIZED BY AN ELECTRICAL CHARGE's DISPLACEMENT ALONG THE BOND's EXTREMITies. As you remember, this Charge's Displacement owing to a High-Moderate's Difference between the Atom's Electronegativities.
QUESTION.3
FALSE.
You wrote :"Is it true that substances composed of polar molecules tend to have lower boiling points than subtances composed of nonpolar molecules?".
As you know, usually results that CHEMICAL STUFFs CHARACTERIZED BY POLAR BONDs SHOW GREATER BOILING POINTs THAN NONPOLAR STUFFs DO.
As you understood, I refer to a very easy LAB's COMPARISON : on the other way, you cannot forget that the comparison must be based on MOLECULAR WEIGHT's similarities.
I hope this helps you.
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1. Is it true that ions do not form polar bonds?
2. Is it true that in a polar covalent bond the atoms have large electrical charges?
3. Is it true that substances composed of polar molecules tend to have lower boiling points than substances composed of nonpolar molecules?
Answer:
1. It depends on what type of ion, but in absolute sense, it is FALSE, many ions from polar bonds. Take carbonate ion for example. The oxygen atoms pull e- forming polar bonds between C-O.
2. This is relative. More information is needed. The question is like asking "Is a House big?" The answer will depend on what you are comparing the electrical charge with.
But if I had to deal with what is just given in your question, I would guess FALSE. Polar covalent bonds have partcial charges.
3. In general, TRUE. Polar molecules have higher boiling points than nonpolar. But when the molecules get really long or big (in certain shapes) the induced dipole (London force) may get much greater than what is expected from smaller molecules, giving them higher boiling points than comparative polar molecule of similar molar mass in some cases.
1)true
2)False
3)Depends upon bond enthalpy
Lancenigo di Villorba (TV), Italy
I read the preceeding answers and I THINK THERE COULD BE SOME MISTAKEs.
I have to send you my answer.
QUESTION.1
FALSE.
You wrote :"Is it true that ions do not form polar bonds?".
As you know, several Polar Solvents result able to dissolve Ionic Compounds, e.g. ITS OWN IONs UNDERGO EFFECTIVELY SOLVATATION.
In this fashion, I shown you a common example where POLAR SOLVENTs MAY BIND IONs BY MEANS OF POLAR BONDs.
QUESTION.2
SOMETIMES, IT MAY BE TRUE.
You wrote :"Is it true that in a polar covalent bond the atoms have large electrical charges?".
As you know, several Polar Covalent Bonds are COVALENT BONDs CHARACTERIZED BY AN ELECTRICAL CHARGE's DISPLACEMENT ALONG THE BOND's EXTREMITies. As you remember, this Charge's Displacement owing to a High-Moderate's Difference between the Atom's Electronegativities.
QUESTION.3
FALSE.
You wrote :"Is it true that substances composed of polar molecules tend to have lower boiling points than subtances composed of nonpolar molecules?".
As you know, usually results that CHEMICAL STUFFs CHARACTERIZED BY POLAR BONDs SHOW GREATER BOILING POINTs THAN NONPOLAR STUFFs DO.
As you understood, I refer to a very easy LAB's COMPARISON : on the other way, you cannot forget that the comparison must be based on MOLECULAR WEIGHT's similarities.
I hope this helps you.
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