Answer :
To determine which compound will dissociate when it dissolves in water, we need to understand the nature of each compound and its behavior in aqueous solution.
1. OF2 (oxygen difluoride):
- OF2 is a covalent compound, meaning it consists of atoms bonded together by shared electrons.
- Covalent compounds generally do not dissociate into ions when dissolved in water.
- Therefore, OF2 does not dissociate in water.
2. CH3F (methyl fluoride):
- CH3F is also a covalent compound composed of carbon, hydrogen, and fluorine atoms.
- Similar to OF2, it does not dissociate into ions when dissolved in water.
- Therefore, CH3F does not dissociate in water.
3. NF3 (nitrogen trifluoride):
- NF3 is another covalent compound, characterized by the sharing of electrons between nitrogen and fluorine atoms.
- It does not dissociate into ions in water.
- Therefore, NF3 does not dissociate in water.
4. NaF (sodium fluoride):
- NaF is an ionic compound, formed by the electrostatic attraction between a sodium ion (Na+) and a fluoride ion (F-).
- Ionic compounds typically dissociate into their constituent ions when dissolved in water.
- When NaF is dissolved in water, it dissociates into Na+ and F- ions.
- Therefore, NaF will dissociate in water.
After analyzing each of the compounds, we can conclude that the compound which will dissociate when it dissolves in water is NaF (sodium fluoride).
1. OF2 (oxygen difluoride):
- OF2 is a covalent compound, meaning it consists of atoms bonded together by shared electrons.
- Covalent compounds generally do not dissociate into ions when dissolved in water.
- Therefore, OF2 does not dissociate in water.
2. CH3F (methyl fluoride):
- CH3F is also a covalent compound composed of carbon, hydrogen, and fluorine atoms.
- Similar to OF2, it does not dissociate into ions when dissolved in water.
- Therefore, CH3F does not dissociate in water.
3. NF3 (nitrogen trifluoride):
- NF3 is another covalent compound, characterized by the sharing of electrons between nitrogen and fluorine atoms.
- It does not dissociate into ions in water.
- Therefore, NF3 does not dissociate in water.
4. NaF (sodium fluoride):
- NaF is an ionic compound, formed by the electrostatic attraction between a sodium ion (Na+) and a fluoride ion (F-).
- Ionic compounds typically dissociate into their constituent ions when dissolved in water.
- When NaF is dissolved in water, it dissociates into Na+ and F- ions.
- Therefore, NaF will dissociate in water.
After analyzing each of the compounds, we can conclude that the compound which will dissociate when it dissolves in water is NaF (sodium fluoride).
