Question

Дія лікарських препаратів. Хлоридна кислота входить до складу шлункового соку. За її нестачі в організмі, лікар призначає внутрішнє вживання розчину хлоридної кислоти певної концентрації. Підвищений вміст кислоти у шлунку спричиняє печію. У такому випадку людина вживає ліки, наприклад препарат «Ренні», до складу якого входить кальцій карбонат. Поясніть дію цього препарату__________________________________________________________________________________________________________________________Змоделюйте процес, який відбувається у шлунку, провівши реакцію між кальцій карбонатом і хлоридною кислотою. Що спостерігається?_________________________Напишіть рівняння реакції у молекулярному, повному та скороченому йонному вигляді:_______________________________________________________________________________________________________________________________________________________________________________________________________________________

Answer 1

The Action of Medications and the Role of Calcium Carbonate in Treating Excess Stomach Acid

When there is a deficiency of hydrochloric acid (HCl) in the stomach, a doctor may prescribe the oral intake of a solution containing hydrochloric acid at a specific concentration. This is done to increase the acid content in the stomach and alleviate symptoms such as heartburn. In such cases, individuals may take medications like "Rennie," which contains calcium carbonate as one of its active ingredients.

The action of calcium carbonate in "Rennie": - Calcium carbonate acts as an antacid, which means it helps neutralize excess stomach acid by reacting with the hydrochloric acid present in the stomach. - When calcium carbonate reacts with hydrochloric acid, it forms calcium chloride, carbon dioxide gas, and water.

Modeling the Reaction between Calcium Carbonate and Hydrochloric Acid in the Stomach

The reaction between calcium carbonate and hydrochloric acid in the stomach can be modeled as follows:

Molecular equation: ``` CaCO3(s) + 2HCl(aq) → CaCl2(aq) + CO2(g) + H2O(l) ```

Ionic equation: ``` CaCO3(s) + 2H+(aq) + 2Cl-(aq) → Ca2+(aq) + 2Cl-(aq) + CO2(g) + H2O(l) ```

Net ionic equation: ``` CaCO3(s) + 2H+(aq) → Ca2+(aq) + CO2(g) + H2O(l) ```

Observations during the Reaction

During the reaction between calcium carbonate and hydrochloric acid, several observations can be made:

1. Effervescence: Carbon dioxide gas (CO2) is released as bubbles, leading to effervescence or fizzing. 2. Formation of a solution: Calcium chloride (CaCl2) is formed, which dissolves in water to form a clear solution. 3. Heat release: The reaction is exothermic, meaning it releases heat energy.

It is important to note that the reaction occurs in the stomach, where the conditions are different from a laboratory setting. The stomach contains other substances, such as enzymes and food, which can affect the reaction kinetics and overall observations.

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