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Lesson Worksheet: Properties of Water Science

In this worksheet, we will practice explaining the properties of the polar molecule water.

Q1:

What is the name given to a solvent like water that is able to dissolve ionic substances such as salt?

  • AA polar solvent
  • BA nonpolar solvent
  • CAn electrostatic solvent
  • DAn ionized solvent
  • EA hydrogen solvent

Q2:

Inter- is a prefix that means between or among groups, whereas intra- is a prefix that means on the inside or within.

What is the name of an intermolecular attraction or force that exists between molecules of water?

  • ACovalent bonding
  • BIonic bonding
  • CHydrogen bonding
  • DMetallic bonding
  • EOxygen–hydrogen bonding

What is the name of the intramolecular attraction or force that exists between atoms within a molecule of water?

  • AA metallic bond
  • BAn ionic bond
  • CAn electrostatic bond
  • DA covalent bond
  • EA hydrogen bond

Q3:

The diagram shows hydrogen bonding between water molecules.

Which arrow on the diagram correctly identifies a line that represents a hydrogen bond?

  • AArrow 2
  • BArrow 1

Which of the following statements best describes a hydrogen bond?

  • AA weak electrostatic attraction between molecules
  • BA strong electrostatic attraction between atoms
  • CA weak electrostatic attraction between atoms
  • DA strong electrostatic attraction between molecules

Q4:

Oxygen is the first element in group 16 of the periodic table.

What should the approximate boiling point of water be according to the trend line on the graph?

  • A0C
  • B90C
  • C92C
  • D86C
  • E100C

What is the actual boiling point of water? Why is there a difference, if at all?

  • A0C, because the hydrogen bonding between the molecules of water turns the liquid to ice
  • B100C, because the covalent bonding between the atoms in water raises the boiling point
  • CAround 90C, because the hydrogen bonding between the molecules of water lowers the boiling point
  • DNo difference because the hydrogen bonding between the molecules of water stabilizes the substance
  • E100C, because the hydrogen bonding between the molecules of water raises the boiling point

Q5:

A single water molecule consists of two hydrogen atoms and one oxygen atom. Which of the following statements explains why water is a polar molecule?

  • AHydrogen atoms are much smaller than oxygen atoms.
  • BThere is a big difference in electronegativity between hydrogen atoms and oxygen atoms.
  • CIntermolecular forces known as hydrogen bonds exist between water molecules.
  • DThe electronegativity of hydrogen atoms and that of oxygen atoms are very similar.
  • EThere are more hydrogen atoms than oxygen atoms within each water molecule.

Q6:

Which of the following sequences of statements correctly describes why ice floats on water?

  • A1
  • B5
  • C2
  • D4
  • E3

Q7:

Oxygen is more electronegative than hydrogen and attracts the bonding electrons in a molecule of water closer to itself. 𝛿+ and 𝛿 are used to show partial charges in chemistry. Which diagram correctly shows the partial charges on a molecule of water?

  • A
  • B
  • C
  • D
  • E

Q8:

Water is essential for life on Earth.

What is the boiling point of pure water at sea level?

What is the melting point of pure water at sea level?

Q9:

The picture shows water molecules in a uniform fixed hexagonal arrangement created by hydrogen bonds.

What state of matter would you expect to find water in when it is in this structural arrangement?

  • AIce (solid)
  • BWater (liquid)
  • CSteam (gas)

Q10:

What causes an iceberg, like the one in the picture, to float partially on the surface rather than sink to the bottom of the ocean?

Underwater view of iceberg-edited
  • AMost of the iceberg is underwater and touches the ocean floor.
  • BThe iceberg is mainly made of ice, which is less dense than water and so it floats.
  • CThe cold weather of the Arctic means that the density of the seawater is greater than in warmer climates.
  • DThe high concentration of salt in the ocean enables the iceberg to stay afloat.
  • EIcebergs melt and form very quickly, which does not allow them time to sink to the bottom of the ocean.

This lesson includes 20 additional questions for subscribers.

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