AICE Quiz 1.2 - Solubility in Water

What does this diagram represent?

• water molecules becoming polar
• salt being dissolved into water
• the formation of ionic bonds
• the formation of covalent bonds

Which of the following would you NOT use to test the pH of a solution?

• a litmus test strip
• a digital pH probe
• universal indicator solution
• a refractometer

For the following question, choose the best response based on the command word used: DESCRIBE the oxygen minimum layer.

• The oxygen minimum layer is the portion of the water column that has the lowest levels of dissolved oxygen.
• The oxygen minimum layer has reduced levels of oxygen due to having no photosynthesis occurring there, but significant levels of respiration occurring.
• The oxygen minimum layer occurs around 500 m, but can vary in different regions.

For the following question, choose the best response based on the command word used: IDENTIFY the most abundant ions dissolved in seawater.

• Sodium (Na+) and Chloride (Cl-)
• Sodium and chloride are the most abundant ions in seawater. When both are present, the sodium will give an electron to the chlorine, and as a result the two atoms become ions. Their opposing charges attract them to one another to form an ionic bond
• When sodium chloride is added to water, the polar water molecules pull the salt molecule apart, surrounding each of the individual ions. The sodium and the chloride ions are the most abundant ions found in the seawater.

Water is able to dissolve more substances than any other substance. Why?

• because of it's polarity
• because it is so abundant on earth
• because it is present in different phases on earth
• because it can be heated to high temperatures

Which of the beakers represents the most acidic solution?

• Beaker A
• Beaker B
• Beaker C
• Beaker D
• Beaker E

In which layer of the ocean do ALL of the following factors occur regarding the concentration of dissolved oxygen: a) no interaction with the atmosphere, b) very little respiration, c) no photosynthesis, d) very little decomposition, and e) increased solubility of gases due to very cold water and high pressure

• surface layer
• oxygen minimum layer
• deep layer

Which of the following statements best describes the data represented in this graph?

• Cold water can dissolve more gas than water at warmer temperatures
• Warm water can dissolve more gas than water at colder temperature
• Increased concentrations of dissolved oxygen can dramatically increase the temperature of water

At which location would you expect to find the lowest salinity?

• site 1
• site 2
• site 3

In the Don Juan Pond in Antarctica, the water does not freeze, even at a temperature of -50 degrees C. Why is that?

• The salinity of the pond is 350-400 ppt, and the salt content lowers the freezing point of the water
• The high concentration of dissolved oxygen in the water keeps the water from freezing to a solid
• The water is too cold to freeze
• There is no evaporation