Ocean Acidification

Front

What is ocean acidification?

Back

Ocean acidification refers to the decrease in pH levels of the ocean due to the absorption of excess atmospheric CO2, leading to more acidic waters.

Front

What is the pH scale?

Back

The pH scale measures how acidic or basic a solution is, ranging from 0 (very acidic) to 14 (very basic), with 7 being neutral.

Front

What happens to carbonate ions (CO3^2-) as ocean pH decreases?

Back

As ocean pH decreases, the concentration of carbonate ions (CO3^2-) also decreases, which can affect marine life that relies on these ions for shell formation.

Front

What is the chemical equation for the formation of carbonic acid (H2CO3) from carbon dioxide and water?

Back

CO2 + H2O -> H2CO3

Front

What is the relationship between pH and acidity?

Back

A lower pH value indicates higher acidity, while a higher pH value indicates lower acidity.

Front

What is the dissociation of carbonic acid in water?

Back

H2CO3 <-> HCO3^- + H^+

Front

How does increased CO2 in the atmosphere affect ocean chemistry?

Back

Increased CO2 leads to more carbonic acid formation, which lowers the pH of ocean water, causing ocean acidification.

Front

What are the potential impacts of ocean acidification on marine ecosystems?

Back

Ocean acidification can harm marine organisms, particularly those with calcium carbonate shells, such as corals and shellfish, affecting biodiversity and food webs.

Front

What is the significance of bicarbonate ions (HCO3^-) in ocean chemistry?

Back

Bicarbonate ions (HCO3^-) act as a buffer in ocean water, helping to moderate pH changes and maintain stable conditions for marine life.

Front

What is the role of calcium carbonate (CaCO3) in marine environments?

Back

Calcium carbonate (CaCO3) is used by marine organisms to build shells and skeletons; its availability is affected by ocean acidification.