Question

matching question
match the water depth to the expected relative ph level due to co₂ concentrations.
instructions
surface water
deep water
the ph is high (alkaline) due to low concentrations of co₂.
the ph is low (acidic) due to high concentrations of co₂.

Explanation:

Surface water has more contact with the atmosphere, allowing for gas exchange. CO₂ can escape into the atmosphere, resulting in lower CO₂ concentrations and a higher (more alkaline) pH. Deep - water has less gas exchange with the atmosphere. Organic matter decomposition in deep - water releases CO₂, increasing its concentration and making the water more acidic (lower pH).

Answer:

Surface water - The pH is high (alkaline) due to low concentrations of CO₂
Deep water - The pH is low (acidic) due to high concentrations of CO₂