Molecular Analysis In The Solubility Process

Previously, some Sodium Chloride salt that was put into water could dissolve into the water. Why is that?

Transcript

00:00Previously, some sodium chloride salt that was put into water could dissolve into the water.

00:10Why is that?

00:12Let's look at it on a molecular scale.

00:19Molecules in solids such as salt are arranged regularly in a certain pattern.

00:26When salt is put into water, these molecules ionize into sodium ions and chloride ions.

00:33The size of the sodium ions and chloride ions is almost the same as the size of water molecules,

00:41so that the Na plus and Cl minus ions can be evenly distributed between the water molecules.

00:48The separation distance between the Na plus ions and Cl minus ions varies and is relatively far.

00:55That is why the solid form of salt in water is no longer visible.

01:03Now, assume that 375 grams of salt can be represented by 6 molecules of sodium chloride,

01:10and the volume of water is 1 liter.

01:16If the mass of dissolved salt is less than 375 grams, all salt molecules will be ionized.

01:34If the mass of regular salt is more than 375 grams,

01:38then some salt molecules will remain in the form of sodium chloride molecules.

01:43Because water can only dissolve 6 molecules of sodium chloride.

01:51Well, the salt molecules that are still in molecular form are what look like a sedimentary mass.

02:03So, from here we know that, the substances dissolved in water are in the form of their ions.

02:10While the substances that settle at the bottom of the tube are substances that are still in molecular form.

02:19Hopefully useful.

02:21And, don't forget to follow this channel.