The main acid in the stomach is hydrochloric acid $(HCl)$. Which chemical equations show a reaction that occurs when someone takes an antacid? Check all that apply.
$HCl + NaOH \rightarrow NaCl + H_2O$
$2 HCl + CaCO_3 \rightarrow CaCl_2+ CO_2+ H_2O$
$2 HCl + Mg(OH)_2 \rightarrow MgCl_2+2 H_2O$
$6 HCl +2 Al \rightarrow 2 AlCl_3+3 H_2$
$HCl + NaHCO_3 \rightarrow NaCl + H_2O + CO_2$
Answer (2)
Identify that antacids neutralize stomach acid (HCl) by reacting with bases.
Examine each equation to determine if it represents a neutralization reaction between HCl and a base.
Reactions 1, 2, 3, and 5 are neutralization reactions.
The chemical equations that show a reaction that occurs when someone takes an antacid are equations 1, 2, 3, and 5.
Explanation
Understanding the Problem The problem asks us to identify which of the given chemical equations represent reactions that occur when someone takes an antacid to neutralize stomach acid (HCl). Antacids are typically bases, so we need to look for reactions where HCl reacts with a base.
Analyzing the Equations Let's examine each equation:
H Cl + N a O H → N a Cl + H 2 O : Here, HCl reacts with NaOH (sodium hydroxide), which is a strong base. This is a neutralization reaction.
2 H Cl + C a C O 3 → C a C l 2 + C O 2 + H 2 O : Here, HCl reacts with C a C O 3 (calcium carbonate), which is a base. This is also a neutralization reaction.
2 H Cl + M g ( O H ) 2 → M g C l 2 + 2 H 2 O : Here, HCl reacts with M g ( O H ) 2 (magnesium hydroxide), which is a base. This is a neutralization reaction.
6 H Cl + 2 A l → 2 A lC l 3 + 3 H 2 : Here, HCl reacts with Al (aluminum), which is a metal. This is a redox reaction, not a neutralization reaction.
H Cl + N a H C O 3 → N a Cl + H 2 O + C O 2 : Here, HCl reacts with N a H C O 3 (sodium bicarbonate), which is a base. This is a neutralization reaction.
Identifying the Correct Reactions Based on the analysis, the reactions that occur when someone takes an antacid are:
H Cl + N a O H → N a Cl + H 2 O
2 H Cl + C a C O 3 → C a C l 2 + C O 2 + H 2 O
2 H Cl + M g ( O H ) 2 → M g C l 2 + 2 H 2 O
H Cl + N a H C O 3 → N a Cl + H 2 O + C O 2
Final Answer Therefore, the chemical equations that show a reaction that occurs when someone takes an antacid are equations 1, 2, 3, and 5.
Examples
Antacids are commonly used to relieve heartburn or acid indigestion. These conditions occur when stomach acid backs up into the esophagus, causing a burning sensation. Antacids contain bases like calcium carbonate, magnesium hydroxide, or sodium bicarbonate, which neutralize the excess hydrochloric acid in the stomach, providing relief. The chemical reactions we identified are the processes by which these antacids work to reduce acidity.
The chemical equations that show a reaction occurring when someone takes an antacid are equations 1, 2, 3, and 5. These equations represent neutralization reactions where hydrochloric acid reacts with a base. Specifically, antacids like sodium hydroxide, calcium carbonate, magnesium hydroxide, and sodium bicarbonate can neutralize stomach acid.
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