CHEM132 Experiment 6 Final Exam And
Actual Answers.
solubility - Answer max mass of a substance dissolving in a particular solvent through a
process known as dissolution. Depends on both physical and chemical properties.
likes dissolve likes - Answer polar compounds dissolve in polar solvents. nonpolar substances
dissolve in nonpolar solutes
water as a universal solvent - Answer due to its polar nature. polar covalent OH bond. bent
molecular geometry makes O partially negative and H partially positive.
polarity - Answer arises from the differences in electronegativity between bonded atoms and
the overall molecular geometry. the greater the electronegativity difference between two
bonded atoms, the greater the polarity of the bond.
electronegativity difference - Answer nonpolar: less than 0.5
polar covalent: 0.5-2.0
Ionic: greater than 2
dissolution depends on - Answer the interaction between the solute and the solvent. These
are electrostatic interaction in the case of water and polar ionic compounds due to the charge
on the ions. Partial positive H is attracted to anions (negatively charged) and the partial negative
O is attracted to cation (positive). When an ionic substance is added to water or anther polar
solvent, the 3D crystalline structure is destroyed and the slat dissociates into its component
ions.
hydration energy - Answer energy associated with the interaction between ionic salts and
water
lattice energy - Answer energy released when ionic components are brought together to form
and ionic solid or crystal. Ionic and lattice energy increase with an increase in ionic charge and a
decrease in ionic radius.
in order for the dissolution of an ionic substance to be successful, - Answer the hydration
Actual Answers.
solubility - Answer max mass of a substance dissolving in a particular solvent through a
process known as dissolution. Depends on both physical and chemical properties.
likes dissolve likes - Answer polar compounds dissolve in polar solvents. nonpolar substances
dissolve in nonpolar solutes
water as a universal solvent - Answer due to its polar nature. polar covalent OH bond. bent
molecular geometry makes O partially negative and H partially positive.
polarity - Answer arises from the differences in electronegativity between bonded atoms and
the overall molecular geometry. the greater the electronegativity difference between two
bonded atoms, the greater the polarity of the bond.
electronegativity difference - Answer nonpolar: less than 0.5
polar covalent: 0.5-2.0
Ionic: greater than 2
dissolution depends on - Answer the interaction between the solute and the solvent. These
are electrostatic interaction in the case of water and polar ionic compounds due to the charge
on the ions. Partial positive H is attracted to anions (negatively charged) and the partial negative
O is attracted to cation (positive). When an ionic substance is added to water or anther polar
solvent, the 3D crystalline structure is destroyed and the slat dissociates into its component
ions.
hydration energy - Answer energy associated with the interaction between ionic salts and
water
lattice energy - Answer energy released when ionic components are brought together to form
and ionic solid or crystal. Ionic and lattice energy increase with an increase in ionic charge and a
decrease in ionic radius.
in order for the dissolution of an ionic substance to be successful, - Answer the hydration
