CHEM132- Final Exam Review Questions
And 100% Correct Answers.
In extraction, solid components are separated from each other by adding a specific solvent
which _______ only one component, which is then found in the _______ following filtration. -
Answer dissolves and filtrate
In filtration, the liquid which passes through filter paper is called ______; the material
remaining in the paper is ______. - Answer Filtrate and Residue
Consider the following components which might appear in a mixture to be separated: CaCO3,
CaSO4, Ca(NO3)2. Which one can be separated from the others using HCl? - Answer CaCO3
As the volume of the heated solution ______, the risk of splattering _______. - Answer
Decreases and Increases
CaCO3 dissolves upon the addition of HCl. The CaCO3 can now be separated from SiO2 by
_______ as the CaCO3 is now found in the ________. The CaCO3 is reconstituted by _______. -
Answer Decantation, supernatant, and addition of potassium carbonate
Identify the change described in the following as either chemical or physical:
A cake batter is made by folding milk and eggs into flour, sugar, salt and cocoa. - Answer
Physical
Identify the change described in the following as either chemical or physical:
When cold water is placed in a pot and heated, bubbles rise through the water to the top and
escape into the atmosphere long before it boils. - Answer Physical
Which of the following is not consistent with the role water plays in dissociating ionic
compounds?
A.)The oxygen atom of water pulls electron strength from the hydrogen atoms toward itself,
leaving it with a partial positive charge and the hydrogen atoms with partial negative charges.
B.)Water is a polar covalent solvent; electrons forming the bond between its hydrogen and
oxygen atoms are not shared equally.
C.)When an ionic salt dissolves, the polar ends of water are attracted to oppositely charged ions
, Spectrum - Answer Pattern of visible wavelength colors
% Transmission - Answer The ratio of the initial intensity of light and which reaches the
detector
Blank - Answer Sample containing everything other than the light absorbed material.
Beer's Law - Answer Linear relations between the absorbance and the concentration of
absorbing species
Absorbance - Answer The quantity of light absorbed by a solution
Which of the following does not describe one of the ways the color of ionic solutions is explored
in this experiment?
A.)Whether colored ions are more likely to be constituents of insoluble ionic salts
B.)Whether the cation or anion of an ionic salt is responsible for the salt's color
C.)the relationship between the color of an ionic salt solution and the energy of the light
absorbed by the solution
D.)Whether the color of a dry salt is related to the color of the solution it forms - Answer A
Strontium is a Group IIA metal; it has ________ valence electrons; its cation has the electron
configuration of _________. - Answer 2 and noble gas
Magnesium is a Group IIA metal; it has ______ valence electrons; it's cation has the electron of
a _________. - Answer 2 and noble gas
Potassium is a Group IA metal; it has _______ valence electrons; its cation has the electron
configuration of a _______. - Answer 1 and noble gas.
Cobalt is a _______ metal; it has _____ valence electrons; its cations has the electron
configuration of ____________. - Answer Transition, 2, and partially filled d-shell
Erichrome Black EBT - Answer the indicator us used
And 100% Correct Answers.
In extraction, solid components are separated from each other by adding a specific solvent
which _______ only one component, which is then found in the _______ following filtration. -
Answer dissolves and filtrate
In filtration, the liquid which passes through filter paper is called ______; the material
remaining in the paper is ______. - Answer Filtrate and Residue
Consider the following components which might appear in a mixture to be separated: CaCO3,
CaSO4, Ca(NO3)2. Which one can be separated from the others using HCl? - Answer CaCO3
As the volume of the heated solution ______, the risk of splattering _______. - Answer
Decreases and Increases
CaCO3 dissolves upon the addition of HCl. The CaCO3 can now be separated from SiO2 by
_______ as the CaCO3 is now found in the ________. The CaCO3 is reconstituted by _______. -
Answer Decantation, supernatant, and addition of potassium carbonate
Identify the change described in the following as either chemical or physical:
A cake batter is made by folding milk and eggs into flour, sugar, salt and cocoa. - Answer
Physical
Identify the change described in the following as either chemical or physical:
When cold water is placed in a pot and heated, bubbles rise through the water to the top and
escape into the atmosphere long before it boils. - Answer Physical
Which of the following is not consistent with the role water plays in dissociating ionic
compounds?
A.)The oxygen atom of water pulls electron strength from the hydrogen atoms toward itself,
leaving it with a partial positive charge and the hydrogen atoms with partial negative charges.
B.)Water is a polar covalent solvent; electrons forming the bond between its hydrogen and
oxygen atoms are not shared equally.
C.)When an ionic salt dissolves, the polar ends of water are attracted to oppositely charged ions
, Spectrum - Answer Pattern of visible wavelength colors
% Transmission - Answer The ratio of the initial intensity of light and which reaches the
detector
Blank - Answer Sample containing everything other than the light absorbed material.
Beer's Law - Answer Linear relations between the absorbance and the concentration of
absorbing species
Absorbance - Answer The quantity of light absorbed by a solution
Which of the following does not describe one of the ways the color of ionic solutions is explored
in this experiment?
A.)Whether colored ions are more likely to be constituents of insoluble ionic salts
B.)Whether the cation or anion of an ionic salt is responsible for the salt's color
C.)the relationship between the color of an ionic salt solution and the energy of the light
absorbed by the solution
D.)Whether the color of a dry salt is related to the color of the solution it forms - Answer A
Strontium is a Group IIA metal; it has ________ valence electrons; its cation has the electron
configuration of _________. - Answer 2 and noble gas
Magnesium is a Group IIA metal; it has ______ valence electrons; it's cation has the electron of
a _________. - Answer 2 and noble gas
Potassium is a Group IA metal; it has _______ valence electrons; its cation has the electron
configuration of a _______. - Answer 1 and noble gas.
Cobalt is a _______ metal; it has _____ valence electrons; its cations has the electron
configuration of ____________. - Answer Transition, 2, and partially filled d-shell
Erichrome Black EBT - Answer the indicator us used
