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  • How Glass is Made: The Reaction of Limestone, Sand, and Sodium Carbonate
    When limestone (calcium carbonate - CaCO3) is heated with sand (silicon dioxide - SiO2) and sodium carbonate (Na2CO3), it produces glass.

    Here's a simplified explanation of the process:

    * Heating the mixture: The high temperatures cause the calcium carbonate to decompose into calcium oxide (CaO) and carbon dioxide (CO2).

    * Reaction with sand and sodium carbonate: The calcium oxide reacts with the silicon dioxide and sodium carbonate to form a molten mixture. This mixture contains sodium silicate (Na2SiO3), calcium silicate (CaSiO3) and other compounds.

    * Cooling and forming glass: When the molten mixture cools down, it solidifies into a glassy substance. The exact composition and properties of the glass can be varied by changing the proportions of the starting materials.

    This process is known as soda-lime glassmaking, and it's a common method for producing glass for everyday use.

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