Chemistry 111 Chapter 4 Exam 40 Questions with Verified Answers
The role of water as a solvent (1) - CORRECT ANSWER Water is very reactive with substances in solutions.
Polar Nature of water (3) - CORRECT ANSWER 1.Uneven distribution of charge
2. Covalent Bonds between diff. atoms (H2 and O...
Chemistry 111 Chapter 4 Exam 40 Questions with Verified
Answers
The role of water as a solvent (1) - CORRECT ANSWER Water is very reactive with
substances in solutions.
Polar Nature of water (3) - CORRECT ANSWER 1.Uneven distribution of charge
2. Covalent Bonds between diff. atoms (H2 and O2) have unequal sharing of
electrons.
3. One atom attracts the electron pair more strongly (O2)
Polar Bonds (4) - CORRECT ANSWER 1. a type of covalent bond
2. between atoms that differ in electronegativity.
3.. shared electrons are pulled closer to the more electronegative atom (H2 is
pulled toward O2)
4. making one slightly negative and the other slightly positive
H2O Molecular shape (2) - CORRECT ANSWER 1. Bent with 104.5 angle
2. The partially charged poles point toward Oxygen
Ionic Compounds in Water (3) - CORRECT ANSWER 1. Water replaces electrostatic
attractions bxt ions with other attractions bxt water and the ions
2. The negative charge of water (oxygen) attract cations.
3. The positive charge of water (hydrogen) attract anions
Dissolution (2) - CORRECT ANSWER 1. When the electrostatic attraction bxt the
water and the ion > then the electrostatic attraction bxt the ion and the ion.
2. The dissolving of the substance into individual parts.
dissociates (1) - CORRECT ANSWER separation of ions causing random dispersal of
ions in the solution.
, Solvate - CORRECT ANSWER Surrounded closely by solvent molecules (oftentimes
this is water)
Soluble - CORRECT ANSWER If a substance is dissolved, dissociates and is solvated
it is soluble.
Insoluble - CORRECT ANSWER When the electrostatic attraction bxt the ions in the
substance > then the attractions bxt the solution and the ions
electrolytes - CORRECT ANSWER chemical substances that develop an electric
charge and are able to conduct an electric current when placed in water; ions
Creation of electrolytes (3) - CORRECT ANSWER 1. When substances dissolve in
solution, they break into ions and carry a charge
2. the ions increase the electrical conductivity of the solution
3. the ions then move toward the electrode of the opposite charge of the solution
that is solvating them.
Strong electrolytes - CORRECT ANSWER Soluble Ionic compounds (because they
dissociate completely and conduct large current)
STRONG ACIDS AND STRONG BASES
Weak Electrolytes - CORRECT ANSWER A compound of which a small amount of
dissolved solute exists as ions in an aqueous solution.
WEAK ACIDS AND WEAK BASES
Calculating the number of moles of ions in a solution - CORRECT ANSWER Use the
balanced equation for soluble ionic compounds
Covalent Compounds in Water - CORRECT ANSWER 1. Covalent compounds have
their own polar bonds which attract water.
2. most do not separate into ions
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