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📘 How carbon dioxide dissolves in seawater

Trace gas exchange, carbonic acid, bicarbonate, pH, buffering, and shell-building chemistry.

lessons

~10 min

to learn

🔬 Science

subject

Adults

level

Start the course →

What you’ll learn

Air-sea exchange
Carbonic acid
Carbonate buffer
pH scale
Carbonate availability
Temperature
Biological pump
Coastal variability
Observation
A connected cycle

Questions this course answers

What happens first when atmospheric CO2 enters seawater?

Dissolved CO2 reacts with water and the carbonate system.

Why does pH fall?

Hydrogen ions shift the pH toward acidity.

What does buffering do?

Carbonate and bicarbonate accept hydrogen while changing availability.

Why measure more than pH?

Multiple measurements reveal the full carbonate system.

Grounded in trusted sources

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