Carbon Dioxide and Ocean Chemistry

Harold York, a research scientist, explains how carbon dioxide enters seawater, comparing it to carbonated drinks. He describes the chemical processes involved, such as the formation of carbonic acid and bicarbonate ions. The video also covers how carbon dioxide enters oceans through direct absorption and acid rain, and how factors like temperature affect this process. It concludes with the impact of human activities on carbon dioxide levels in oceans.

What is a common example of carbon dioxide dissolved in water that people are familiar with?

• Saltwater

• Mineral water

• Distilled water

• Carbonated soda

What is the chemical formula for carbonic acid formed when CO2 dissolves in water?

• H3O+

• H2CO3

• H2O

• CO2

Which ion is produced when carbonic acid interacts with water?

• Carbonate ion

• Hydroxide ion

• Bicarbonate ion

• Sulfate ion

How does acid rain contribute to the carbon dioxide levels in the ocean?

• By neutralizing ocean acidity

• By increasing the ocean's temperature

• By precipitating carbon dioxide into the ocean

• By evaporating ocean water

What is the primary way carbon dioxide enters the ocean?

• Through volcanic activity

• Directly as a solution

• Via marine life respiration

• Through river runoff

How does temperature affect the solubility of carbon dioxide in ocean water?

• Solubility is highest at 68°

• Temperature has no effect

• Higher temperatures increase solubility

• Lower temperatures increase solubility

At what temperature does ocean water dissolve about 3 grams of carbon dioxide per kilogram?

• 100°

• 50°

• 68°

• 32°

What is the main source of carbon dioxide produced by humans?

• Agricultural activities

• Burning of fossil fuels

• Deforestation

• Industrial waste

Approximately what fraction of human-produced carbon dioxide is absorbed by the ocean?

• One-half

• One-third

• Two-thirds

• One-fourth

How much carbon is absorbed by the ocean per year due to human activities?

• Four gigatons

• Three gigatons

• Two gigatons

• One gigaton