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En-en adult card 23 hindered calcification process: Difference between revisions
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En-en adult card 23 hindered calcification process (view source)
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== Card #23: Calcification difficulties == | |||
| | <center> | ||
[[File:En-en_adult_card_23_front.png|400px]] | |||
When the pH drops, it becomes harder for calcium carbonate seashells to grow. | |||
</center> | |||
== Explanation == | == Explanation == | ||
The formation of limestone (calcification) follows the chemical reaction Ca<sup>++</sup> + 2HCO<sub>3</sub><sup>-</sup> ⇔ CaCO<sub>3</sub> + H<sub>2</sub>O + CO<sub>2</sub> | The formation of limestone (calcification) follows the chemical reaction Ca<sup>++</sup> + 2HCO<sub>3</sub><sup>-</sup> ⇔ CaCO<sub>3</sub> + H<sub>2</sub>O + CO<sub>2</sub> | ||