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What are the chemical reactions that occur when calcium carbonate is added to double bricks? 


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When calcium carbonate is added to double bricks, it undergoes a chemical reaction. The decomposition of calcium carbonate occurs, resulting in the formation of calcium oxide (CaO) and carbon dioxide (CO2) . This reaction is influenced by factors such as the partial pressure of CO2 and temperature . The process kinetics play a significant role in the observed heat effect and mass losses during dynamic conditions, such as thermogravimetric analysis (TG) and differential thermal analysis (DTA) . The differences in DTA and TG curve shapes reported in the literature can be attributed to equipment design and differing crystalline states of the precursor calcium carbonate . By performing TG at different heating rates and controlled partial pressures of CO2, the results can be critically evaluated to determine the kinetic parameters of the reaction .

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Patent
Ye Qing, Liu Wenhong, Zheng Xiaobin 
12 Aug 2015
2 Citations
The provided paper does not mention anything about the chemical reactions that occur when calcium carbonate is added to double bricks.
The provided paper does not mention anything about adding calcium carbonate to double bricks or the chemical reactions that occur in this scenario.
The provided paper does not mention the specific chemical reactions that occur when calcium carbonate is added to double bricks. The paper focuses on a cyclic industrial process to form biocement using calcium carbonate.
The provided paper does not mention anything about adding calcium carbonate to double bricks or the chemical reactions that occur in this scenario.
The provided paper does not mention anything about adding calcium carbonate to double bricks.

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What will happen double replacement reaction, we combined sodium bicarbonate and hydrochloric acid?5 answersWhen sodium bicarbonate is combined with hydrochloric acid in a double replacement reaction, it results in the production of carbon dioxide gas. The reaction between sodium bicarbonate and hydrochloric acid is instantaneous, but the release of gas is slow due to the dissolution of carbon dioxide in water. Factors such as the volume of the solution, quantity of reactants, air volume, partial pressure of CO2, and stirring rate influence the rate of gas release. Experimental devices have been developed to study this reaction, providing a means to measure the volume of gas produced and compare the reactions of hydrochloric acid with sodium carbonate and sodium bicarbonate. These devices ensure accurate and simultaneous addition of hydrochloric acid to the test tubes containing sodium carbonate and sodium bicarbonate, allowing for easy measurement and comparison of gas volumes produced.
What is the chemistry behind formation of vaterite instead of calcite while mixing cacl2 and na2co3?5 answersThe formation of vaterite instead of calcite when mixing CaCl2 and Na2CO3 is influenced by several factors. The concentration of NH4+ ions, which can be introduced through the use of NH3 aqueous solution, plays a significant role in controlling the crystallization process and preventing vaterite phase transformation. The initial pH of the reaction system also affects the polymorphism of calcium carbonate. Single-phase vaterite can be formed at an initial pH of 2.0-2.5, while calcite and vaterite coexist at higher initial pH values. Additionally, the reaction temperature can influence the formation of different polymorphs. Aragonite can be synthesized at temperatures ≥50℃, and single-phase aragonite is obtained at temperatures ≥60℃. The use of vaterite as a precursor for carbonate apatite artificial bone fabrication has shown faster compositional transformation and bone remodeling compared to using calcite as a precursor. Overall, the chemistry behind the formation of vaterite instead of calcite involves the control of NH4+ concentration, initial pH, and reaction temperature.
Why carbonate has a diferente color?4 answersCarbonate can have different colors due to various factors. One possible reason is the presence of fluorescent dyes, which can be adsorbed onto carbonate particles or incorporated into carbonate crystals, resulting in colored carbonate. Another factor is the presence of trace elements, which can act as activators for fluorescence in carbonate minerals. Additionally, the color of carbonate can be influenced by the presence of organic matter, as observed in dolomites that fluoresce brightly but do not luminesce. Furthermore, the color of carbonate can be affected by diagenetic alteration, which can lead to changes in mineralogy and the incorporation of noncarbonate grains that may contribute to coloration. In the case of carbonate polymer blends, the addition of black colorants, such as carbon black and fatty acid metal salts, can result in a black coloration. On the other hand, calcium carbonate can be used as a white pigment in coloring compositions.
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