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  2. Calcium carbonate - Wikipedia

    en.wikipedia.org/wiki/Calcium_carbonate

    As such water percolates through calcium carbonate rock, the CaCO 3 dissolves according to one of the trends above. When that same water then emerges from the tap, in time it comes into equilibrium with CO 2 levels in the air by outgassing its excess CO 2. The calcium carbonate becomes less soluble as a result, and the excess precipitates as ...

  3. Aragonite - Wikipedia

    en.wikipedia.org/wiki/Aragonite

    Aragonite is a carbonate mineral and one of the three most common naturally occurring crystal forms of calcium carbonate (Ca CO 3), the others being calcite and vaterite.It is formed by biological and physical processes, including precipitation from marine and freshwater environments.

  4. Solubility equilibrium - Wikipedia

    en.wikipedia.org/wiki/Solubility_equilibrium

    A solubility equilibrium exists when a chemical compound in the solid state is in chemical equilibrium with a solution containing the compound. This type of equilibrium is an example of dynamic equilibrium in that some individual molecules migrate between the solid and solution phases such that the rates of dissolution and precipitation are equal to one another.

  5. Carbonate compensation depth - Wikipedia

    en.wikipedia.org/wiki/Carbonate_compensation_depth

    The exact value of the CCD depends on the solubility of calcium carbonate which is determined by temperature, pressure and the chemical composition of the water – in particular the amount of dissolved CO 2 in the water. Calcium carbonate is more soluble at lower temperatures and at higher pressures.

  6. Phil Collins reveals health issue, 'shock' of being unable to ...

    www.aol.com/phil-collins-reveals-health-issue...

    For Phil Collins, decades of rock stardom have not come without a cost.. In "Phil Collins: Drummer First," a new documentary released Wednesday, the musician opened up about the health toll of ...

  7. Limestone - Wikipedia

    en.wikipedia.org/wiki/Limestone

    Limestone outcrops are recognized in the field by their softness (calcite and aragonite both have a Mohs hardness of less than 4, well below common silicate minerals) and because limestone bubbles vigorously when a drop of dilute hydrochloric acid is dropped on it. Dolomite is also soft but reacts only feebly with dilute hydrochloric acid, and ...

  8. A ‘pro-America’ India could help New Delhi win over Trump

    www.aol.com/news/pro-america-india-could-help...

    Like other countries, India has been targeted by Trump, who called New Delhi a “very big abuser” of the bilateral trading relationship during a campaign event in September.

  9. Prince Harry brushes off Duchess Meghan divorce rumors ... - AOL

    www.aol.com/entertainment/prince-harry-brushes...

    That is a real blessing but a lot of people don't have that same level of support." Contributing: Taijuan Moorman, KiMi Robinson and Erin Jensen, USA TODAY.