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).
