Water Chapter 17&18

The water molecule Water is a triatomic molecule. Water is a triatomic molecule. Because of the arrangement of the electrons, it is a bent molecule. Because of the arrangement of the electrons, it is a bent molecule. This bend makes the molecule polar. This bend makes the molecule polar.

Water is a Bent molecule

Water The bend in the molecule gives it its unique properties. The bend in the molecule gives it its unique properties. Polar. Polar. Strong attractions. Strong attractions. Hydrogen bonding Hydrogen bonding

Hydrogen bonding

Water qualities: Surface tension Attraction between water molecules pulls them closer together. Surfactants interfere with these attractions.

Mass and freezing point

Ice

Ice Water as a liquid has its molecules close together. Water as a liquid has its molecules close together. The molecules slide around and rotate around one another. The molecules slide around and rotate around one another. The liquid molecules are in lose contact. The liquid molecules are in lose contact. Ice molecules are evenly spaced apart. Ice molecules are evenly spaced apart. Ice takes more space than water. Ice takes more space than water.

Solvent and Solute Solvent: the liquid Solvent: the liquid Solute: the solid that is dissolved in the solvent Solute: the solid that is dissolved in the solvent Solution: the result of a solute and solvent. Solution: the result of a solute and solvent.

Solvation

Electrolytes Ions in solution that impact the liquids ability to conduct a current Ions in solution that impact the liquids ability to conduct a current Strong electrolytes: salts Strong electrolytes: salts Weak electrolytes: molecular acids Weak electrolytes: molecular acids Non electrolytes: molecules Non electrolytes: molecules Remember your Lab!!! Remember your Lab!!!

Hydration

Hydrates continued Desiccant Desiccant Hydroscopic Hydroscopic

Suspensions & Colloids Suspensions will settle out Suspensions will settle out Colloids remain dispersed Colloids remain dispersed