REVIEW

Electronegativity is the ability to attract electrons.

REVIEW

Polar molecules: Bonds between two atoms with different electronegativities.

REVIEW

Non Polar molecules: Bonds between two atoms with similar electronegativities.

QUESTION

Which of the following will be polar molecules? Include a diagram and justify your answer. HCl F2 I2CH3Cl

THE SOLUTION PROCESS OF SIMPLE IONIC AND COVALENT COMPOUNDS

REVIEW

Ionic bond - transfer of electrons between a metal (cation) and non-metal (anion)

Covalent bond- sharing of electrons between two non-metals (anions)

Covalent bonds can be polar or non-polar.

IONIC COMPOUNDS

When a solute is placed into a solvent, the solvent particles completely surround the surface of the solute particles.

The polar water molecules orientate themselves around each exposed ion on the surface of the solid.

IONIC COMPOUNDS

IONIC COMPOUNDS

If the solute is soluble, the attraction between the solvent solute increases to the point where it finally exceeds the forces holding the crystal lattice.

The separation of an ionic compound into ions is called dissociation

IONIC COMPOUNDS

Solvation is the process of the solvent surrounding the solute ions.

IONIC COMPOUNDS

If the solvent is water than the process of solvation can be called hydration and the solute particles are hydrated.

IONIC COMPOUNDS

http://programs.northlandcollege.edu/biology/Biology1111/animations/dissolve.html

IONIC COMPOUNDS

Dissociation:

NaCl(s) → Na+(aq) + Cl-(aq)

KF(s) → K+(aq) + F-(aq)

NH4NO3(s) →

COVALENT COMPOUNDS

An entire molecule is pulled away from the solid structure and is surrounded by the solvent. C12H22O11(s) C12H22O11(aq)

QUESTIONS

1. Explain the process of CaCl2 dissolving in water. Include a diagram in your explanation.

2. Compare and contrast dissolving ionic compounds and covalent compounds.

3. Use your knowledge of dissociation and solvation to explain why stirring powdered hot chocolate and water dissolves the crystals faster.