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Wed 1/6: Properties of Water
By Meaghan Rubenstein
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Last updated about 5 years ago
20 questions
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Question 20
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In a water molecule, the oxygen atom is
positively charged
Negatively charged
both positively and negatively charged
neutral (no charge)
Water molecules and other water molecules stick together through what type of bonding
covalent bonds
hydrogen bonds
chemical bonds
all of these are true
Cohesion occurs when water molecules
are attracted to each other
are held together with hydrogen bonds
stick to other water molecules
all of these are true
Adhesion occurs when water molecules
stick to other water molecules
are pulled apart
stick to other substances
none of these are true
Water has a high latent heat; this means
it doesn't take a lot of heat to heat water
the bottom of the ocean is colder
it takes a LOT of heat to heat up water
oceans don't freeze solids
Which of the following scenarios is an example of cohesion
water molecules stick to the surface of a mirror
water molecules stick to one another and form a bead
water sticks to the walls of blood vessels
Certain insects can "walk on water" due to the _______ of water, created by ______.
adhesion; specific heat
surface tension; cohesion
this is a false statement
cohesion; universal solvent
How many hydrogen atoms does each water molecule have?
3
1
6
2
What property allows water to stick to glass ?
Cohesion
Adhesion
Surface tension
Solubility
Which of the following is more electronegative in a water molecule?
Hydrogen
Oxygen
What is the definition of polar?
when a molecule can be dissolved in water
when a molecule cannot be dissolved in water
when covalent molecule doesn't share electrons evenly
when a covalent molecule does share electrons evenly
Atoms bonded together often form a(n)....
element
osmosis
molecule
density
The atoms in a water molecule are covalently bonded? This means electrons are _____
removed
transferred
destroyed
shared
Water is a compound formed when two hydrogen atoms and one oxygen atom ______ bond.
covalently
ionically
What type of covalent bonds do water molecules have?
nonpolar covalent
polar slightly ionic
polar covalent
charged covalent
Water will dissolve salt because
they are ionic bonds
water is nonpolar covalent bond and salt is a polar covalent bond
water is an ionic bond and salt is a polar bond
water is a polar covalent bond and salt is an ionic bond
Water does not dissolve oil because
water has an ionic bond
oil is a polar molecule and water is nonpolar molecule
water is a polar molecule and oil is a nonpolar molecule
oil is ionic
Which type of bonds do polar covalent bonds break down in chemical reactions?
polar covalent and ionic bonds
nonpolar covalent bonds and polar covalent bonds
ionic bonds and nonpolar bonds
none of the above
Water molecules in ice are farther apart than in liquid water: so ice is less dense and floats.
True
False
Water is a universal solvant because?
it is a polar covalent bond that can break down both ionic molecules and polar covalent molecules.
Water is ionic and breaks down polar molcules
Water is a non polar covalent bond that breaks down only other non polar molecules
water is what everything is made of so it must be the universal solvent.