Exam (elaborations)
CHEM 464 - Chapter 2 Practice Questions answers latest update
- Course
- CHEM 464
- Institution
- California State University - Northridge
CHEM 464 - Chapter 2 Practice Questions answers latest update
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CHEM 464 - Chapter 2 Practice QuestionsIce has a lower ________ than liquid water. - density
The polarity of the O-H bond is caused by the ________ of oxygen relative to that
of hydrogen. - higher electronegativity
Octane molecules dispersed in water tend to aggregate because that allows water
molecules to be more ________. - disordered
A difference between a strong acid and a weak acid is that the weak acid
is________ in water. - only partially ionized
A solution containing a weak acid (pKa = 7.5) and its conjugate base at pH of8.5
has a good capacity to buffer the addition of ________. - acid
Rank the following interactions in order of increasing strength (start with the
weakestinteraction).
A) London dispersion forces, hydrogen bonds, ionic interactions, covalent bonds
B) covalent bonds, London dispersion forces, ionic interactions, hydrogen bonds
C) hydrogen bonds, London dispersion forces, ionic interactions, covalent bonds
D) ionic interactions, hydrogen bonds, London dispersion forces, covalent bonds -
A) London dispersion forces, hydrogen bonds, ionic interactions, covalent bonds
, Hydrogen bonds within liquid water:'
A) are attractions between protons and hydroxide ions.
B) are attractions between protons and oxygen nuclei.
C) are attractions between protons and oxygen lone pair electrons.
D) are ion-induced dipole attractions. - C) are attractions between protons and
oxygen lone pair electrons.
Methanol (CH3OH) can act both as a H-bond donor and as a H-bond acceptor.
What is the maximal number of H-bonds a single molecule of methanol can form
with surrounding water molecules?
A) 1
B) 2
C) 3
D) 4 - C) 3
Which of the following statements about water is NOT true?
A) In the liquid state it is only 15% less hydrogen bonded than in the solid state
at0°C.
B) It has a high dielectric constant.
C) It dissolves salts and polar substances.
D) It can form two hydrogen bonds per water molecule. - D) It can form two
hydrogen bonds per water molecule.
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