Describe what occurs at the molecular level when NaOH dissolves in water?
Answer:
NaOH sodium hydroxide is a strong base and 100% ionizes in aqueous solution. This means that it will completely dissociate into ions being Na+ and OH-.
At the molecular level, water molecules are polar, meaning that they have a molecular dipole, a side with a slight positive charge and a side with a slight negative charge. Since sodium ions are positively charged, Na+, the negative side of the water molecules will be attracted to and surround the sodium ions. This is called hydration - the surrounding of ions by water molecules. Since the hydroxide ions are negatively charged, the positive side of the water molecules will be attracted to the hydroxide ions.
Overall, when NaOH dissolves in water, the water molecules dissociate NaOH into ions, Na+ and OH-, and then surround the ions in a process called hydration to stabilize the ions in solution.
Basically you should know that NaOH is an ionic compound. The main characteristic feature of an ionic compound is that it will split into its constituent ions when dissolved in water which is a polar solvent. So NaOH will split to give Na+ (cation) and OH-(anion) ions.
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