Carbon Dioxide produced by Reaction between Hydrochloric Acid and Calcium Carbonate

The effect of changing the concentration of hydrochloric acid and the amount of carbon dioxide produced by the reaction between hydrochloric acid and marble chips (calcium carbonate) was investigated. The chemistry course is studying the effect of changing the amount of carbon dioxide and the amount of carbon dioxide produced by the reaction between hydrochloric acid and marble chips (calcium carbonate).

Examine how acid concentration affects the reaction rate of hydrochloric acid and calcium carbonate (magnesium band) --- My goal is how acid concentration changes influence the reaction rate of CaCO 3 and HCl It is to investigate. We change only one of the variables to make the experiment fair. It is the concentration of acid. In all the experiments we had to maintain the amount of acid, the quality and size of the marble chip, and the temperature of the acid to ensure a fair test.

The acid releases carbon dioxide from most metal carbonates. Therefore, it can be obtained directly from the natural carbonated spring produced by acting acid water on limestone and dolomite. The reaction of hydrochloric acid and calcium carbonate (limestone or chalk) is as follows. When oxidizing carbohydrates, fatty acids and proteins, all aerobic organisms produce carbon dioxide. Many reactions involved are very complex and not easy to describe. Reference (cell respiration, anaerobic respiration and photosynthesis). The respiration formula of glucose and other monosaccharides,

Its main components are fluorine, silica and calcium carbonate. Toothpaste contains 20% calcium carbonate. The reaction products of calcium carbonate and hydrochloric acid are calcium chloride, water and carbon dioxide. Calcium carbonate in toothpaste cleans teeth, promotes oral hygiene, and prevents dental plaque formation on teeth. A reasonable reason to carry out this experiment is to ensure that the proportion of CaCO 3 in toothpaste is about 20%. Above 20%, the enamel may be damaged and tooth hypersensitivity and tooth yellowing may be caused.

Since calcium carbonate is insoluble in water, back-titration is used to determine the proportion of calcium carbonate in toothpaste. According to the equilibrium equation: CaCO 3 + 2 HCl → CaCl 2 + H 2 O + CO 2, the measured amount of calcium carbonate containing toothpaste is reacted with excess hydrochloric acid to obtain the reaction products, namely calcium chloride, carbon dioxide and water obtain. Since excess hydrochloric acid is still present and does not react with calcium carbonate, back titration is carried out between excess hydrochloric acid and sodium hydroxide solution to understand the volume of excess hydrochloric acid. The amount of excess hydrochloric acid can be calculated by the following equation. = Since the amount of excess hydrochloric acid is known, the amount of hydrochloric acid reacted with CaCO 3 can be calculated by subtracting that amount from the amount of initial hydrochloric acid. Excess hydrochloric acid