Respuesta :
Answer:
B.) 2 HCl(aq) + CaCO₃(s) → CaCl₂(aq) + H₂O(l) + CO₂(g)
C.) 7.4 × 10² mL
D.) 2 HCl(aq) + Mg(OH)₂(aq) → MgCl₂(aq) + H₂O(l)
E.) 1.3 × 10³ mL
Explanation:
The daily output of stomach acid (gastric juice) is 1000 to 2000 mL. Prior to a meal, stomach acid (HCl) typically has a pH of 1.49.
We can calculate the concentration of H⁺ using the definition of pH.
pH = -log [H⁺]
[H⁺] = antilog -pH = antilog (-1.49) = 0.0324 M
Since HCl is a strong monoprotic acid, we can consider this to be the concentration of HCl as well.
B.) One chewable tablet of the antacid Maalox contains 600 mg of CaCO₃. Enter the neutralization equation. Express your answer as a molecular equation including phases.
The neutralization equation is:
2 HCl(aq) + CaCO₃(s) → CaCl₂(aq) + H₂O(l) + CO₂(g)
C.) Given that one chewable tablet of the antacid Maalox contains 600 mg of CaCO₃, calculate the milliliters of stomach acid neutralized by two tablets of Maalox. Express the volume in milliliters to two significant figures.
We can establish the following relations:
- Each tablet has 600 mg (0.600 g) of CaCO₃.
- The molar mass of CaCO₃ is 100.09 g/mol.
- The molar ratio of HCl to CaCO₃ is 2:1.
- The concentration of HCl is 0.0324 mol/L.
The mililiters of HCl that neutralize 2 tablets of Maalox are:
[tex]2Tablet.\frac{0.600gCaCO_{3}}{1Tablet} .\frac{1molCaCO_{3}}{100.09gCaCO_{3}} .\frac{2molHCl}{1molCaCO_{3}} .\frac{1000mLHCl}{0.0324molHCl} =7.4 \times 10^{2} mLHCl[/tex]
D.) The antacid milk of magnesia contains 400 mg of Mg(OH)₂ per teaspoon. Enter the neutralization equation. Express your answer as a molecular equation including phases.
The neutralization equation is:
2 HCl(aq) + Mg(OH)₂(aq) → MgCl₂(aq) + H₂O(l)
E.) Given that the antacid milk of magnesia contains 400 mg of Mg(OH)₂ per teaspoon, calculate the number of milliliters of stomach acid that are neutralized by 1 tablespoon of milk of magnesia. (1 tablespoon = 3 teaspoons.)Express the volume in milliliters to two significant figures.
We can establish the following relations:
- 1 tablespoon = 3 teaspoons
- 1 teaspoon contains 400 mg (0.400 g) of Mg(OH)₂
- The molar mass of Mg(OH)₂ is 58.32 g/mol.
- The molar ratio of HCl to Mg(OH)₂ is 2:1.
- The concentration of HCl is 0.0324 mol/L.
The mililiters of HCl that neutralize 1 tablespoon of milf of magnesia are:
[tex]1Tablespoon.\frac{3Teaspoon}{1Tablespoon} .\frac{0.400gMg(OH)_{2}}{1Teaspoon} .\frac{1molMg(OH)_{2}}{58.32gMg(OH)_{2}} .\frac{2molHCl}{1molMg(OH)_{2}} .\frac{1000mLHCl}{0.0324molHCl} =1.3 \times 10^{3} mLHCl[/tex]
The neutralization equation for the given elements is: B.) 2 HCl(aq) + CaCO₃(s) → CaCl₂(aq) + H₂O(l) + CO₂(g)
The milliliters of stomach acid neutralized by two tablets of Maalox is: C.) 7.4 × 10² mL
The neutralization equation is D.) 2 HCl(aq) + Mg(OH)₂(aq) → MgCl₂(aq) + H₂O(l)
The number of milliliters of stomach acid that are neutralized by 1 tablespoon of milk of magnesia is E.) 1.3 × 10³ mL
Calculation and Parameters
The daily output of stomach acid (gastric juice) is 1000 to 2000 mL. Before a meal, stomach acid (HCl) typically has a pH of 1.49.
Then, we calculate the concentration of H⁺ using the definition of pH.
- pH = -log [H⁺]
- [H⁺] = antilog -pH
- = antilog (-1.49)
= 0.0324 M
Since HCl is a strong monoprotic acid, we can consider this to be the concentration of HCl as well.
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