0
They dissolve in water because the attractive forces (ion-dipole interaction) that are formed between the ions and the polar water molecules release energy which compensate for the energy required when the ions get separated.
The formation of solutions is an important part of chemical energetics which is a chapter in physical chemistry.
Normally, an ionic compound dissolves if the process is exothermic, that is, if energy is released from the process. This energy is known as DHsolution
When an ionic compound dissolves, two processes are involved:
The first is the separation of the ions to the gaseous state, and this is normally referred to as 'negative of lattice energy' ( -DHlattice)
In equations, this is stated as: K+Cl-(s) gives K+(g) + Cl-(g)
The second process is the hydration of the ions. Using equations, this is stated as:
K+(g) + Cl-(g) gives K+(aq) + Cl-(aq)
Now, DHsolution = DHhydration - DHlattice
For most ionic compounds (and for KCl), magnitude DHhydration is greater than the magnitude of DHlattice giving an overall negative value for DHsolution (Note that DHlattice is negative as well as DHhydration). Thus, the ionic compound will dissolve.
What else can I help you with?
Is a substance does not dissolve in water is it a ionic polar or nonpolor?
Like dissolve likes, therefore since water is polar and it does not dissolve, the substance is nonpolar.
What type of solvent is best suited to dissolve ionic or highly polar substance?
The type of solvent that is best suited to dissolve an ionic or a highly polar solvent would also be highly polar, probably a polar protic solvent like water or alcohol.
What substances that do not dissolve easily in water?
you know water is a polar substance and can solve only polar substances and ionic substance it is not able to solve fat , oil or other organic (usually) substances (oil). by ionic substance I meant substances such as salt
Which substances dissolves in water?
like dissolves like..water is polar so polar or ionic substances will dissolve in water
What things dissolves in water?
Polar molecules like sugar and ionic substances like salt will dissolve in water.
What substance dissolves best in water?
Ionic compounds, such as table salt (sodium chloride), generally dissolve best in water due to the attraction between the ions and water molecules. Additionally, polar molecules, like sugar and alcohols, can also dissolve well in water because water is a polar solvent that can easily interact with the polar molecules.
What substance in soluble in the water phase?
Substances that are polar or ionic in nature are generally soluble in water, as water is a polar solvent. Nonpolar substances, such as fats and oils, are typically insoluble in water but may dissolve in nonpolar solvents like oil or hexane.
Can CCL4 dissolve ionic compounds?
CCl4 is a non polar solvent and therefore dissole ionic compounds
What does solubility mean and what is a solution?
Solubility is how much of a substance will dissolve in a given solvent. The rule for solubility is "like dissolves like". So polar substances, like ionic compounds, will dissolve in polar solvents, like water. Non-polar substances, like organics, will dissolve in more non-polar organic solvents, like acetone, ethanol, benzene, etc.
Are ionic substances soluble in cyclohexane?
No, ionic substances are typically not soluble in cyclohexane because cyclohexane is nonpolar and does not have the ability to dissolve charged particles like ions. Ionic substances generally dissolve in polar solvents like water.
Does water dissolve most things?
Yes. Water is known as a very good solvent mostly because of its ionic structure. Mostly water dissolves ionic compounds because of the like dissolves like.
Does ionic compounds such as chloride NaCl dissolve easily in water?
OK so a compound such as sodium chloride dissolves in water because water molecules can orient themselves according to a charge of the particle Na+ and Cl- so that ions are pulled apart from one another and they dissolve. This can also happen the other way around when water is evaporated the less water there is the more closer the ions are.
