substance that neutralizes 2.0 L of gastric juice at pH 2.0 Calculate how many grams of Mg (OH) 2 for neutralization to occur. ?

Question

Heartburn (acid regurgitation) occurs when acidic gastric juice enters the esophagus. Heartburn can be treated with antacids. Magnesium hydroxide, Mg (OH) 2, is an antacid with a molecular weight of 58.3 g / mol. A person eats a dose of this substance that neutralizes 2.0 L of gastric juice at pH 2.0
B. Calculate how many grams of Mg (OH) 2 the person has eaten for neutralization to occur.

hcbiochem · Accepted Answer

To have a pH = 2.0, the molar concentration of HCl = 10^-2.0 = 0.010 M HCl
Balanced equation: Mg(OH)2 + 2 HCl --> MgCl2 + 2 H2O

0.01 mol/L HCl X 2 L X (1 mol Mg(OH)2 / 2 mol HCl) X 58.3 g/mol = 0.58 g Mg(OH)2

substance that neutralizes 2.0 L of gastric juice at pH 2.0 Calculate how many grams of Mg (OH) 2 for neutralization to occur. ?

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