By the late Hadean, the ocean's pH was closer to neutral due to A- combination of CO₂ with water B- young Subduction zones C- erosion of rocks by water D- rainfall on the oceans
Question
By the late Hadean, the ocean's pH was closer to neutral due to A- combination of CO₂ with water B- young Subduction zones C- erosion of rocks by water D- rainfall on the oceans
Solution
The correct answer is A- combination of CO₂ with water.
Here's a step-by-step explanation:
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During the Hadean eon, the Earth's atmosphere was primarily composed of carbon dioxide (CO₂).
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When CO₂ comes into contact with water (H₂O), it can combine to form carbonic acid (H₂CO₃), a weak acid.
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This carbonic acid can further dissociate into hydrogen ions (H⁺) and bicarbonate ions (HCO₃⁻).
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The presence of these ions in the ocean can affect the pH, or acidity, of the water.
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However, because carbonic acid is a weak acid, it does not fully dissociate in water. This means that not all of the CO₂ that combines with water will produce H⁺ ions.
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As a result, the overall effect of CO₂ combining with water would be to lower the pH of the ocean, making it more acidic.
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However, because the process does not fully dissociate the CO₂, the ocean's pH would not become extremely acidic, but rather closer to neutral.
Therefore, by the late Hadean, the ocean's pH was closer to neutral due to the combination of CO₂ with water.
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