Water and Its Solutions

What will you learn in Lesson 3 of Chemistry in Biology?

• The differences between suspensions and solutions.

• The history of the periodic table.

• How crystals are formed.

• The structure of DNA.

What topic is addressed in relation to acids in the lesson?

• How acids differ from bases.

• The chemical composition of acids.

• The history of the discovery of acids.

• The application of acids in the industry.

What force is mentioned in the lesson?

• Van der Waals forces.

• Gravitational forces.

• Electromagnetic forces.

• Nuclear forces.

How are water molecules formed?

• By ionic bonds that join two hydrogen atoms to an oxygen atom.

• By covalent bonds that join two hydrogen atoms to an oxygen atom.

• By metallic bonds that join two hydrogen atoms to an oxygen atom.

• By hydrogen bonds that join two hydrogen atoms to an oxygen atom.

What charge does oxygen have in a water molecule?

• Slightly positive

• Neutral

• Slightly negative

• Very positive

What is the name of the unequal distribution of electrons in a water molecule?

• Non-polar molecules

• Ionic molecules

• Polar molecules

• Metallic molecules

How are water molecules formed?

• By the union of two hydrogen atoms and one oxygen atom

• By the union of two oxygen atoms and one hydrogen atom

• By the union of three hydrogen atoms

• By the union of one hydrogen atom and two oxygen atoms

What are Van der Waals forces?

• Strong and permanent forces between molecules

• Weak and temporary forces between neutral molecules

• Forces that only occur in polar molecules

• Forces that depend on covalent bonds

What causes the formation of temporary dipoles in Van der Waals forces?

• Uniform distribution of electrons

• Unequal distribution of electrons

• Strong covalent bonds

• Ionic interactions

What does the strength of Van der Waals forces depend on?

• The temperature of the environment

• The distance between the molecules

• Atmospheric pressure

• The polarity of the molecules