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How many equivalents of an acid or base are in the following?0.25 mol Mg(OH)₂
10. Acids and Bases
Acid-Base Equivalents
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Identify the acid that possesses an equivalent weight of 63 grams.
A
H2C2O4
B
HCl
C
HNO3
D
H2CO3
Verified step by step guidance1
Understand the concept of equivalent weight: Equivalent weight is the mass of an acid that supplies one mole of hydrogen ions (H⁺) in a reaction. It is calculated by dividing the molar mass of the acid by the number of hydrogen ions it can donate.
Calculate the molar mass of each acid: Determine the molar mass of H₂C₂O₄, HCl, HNO₃, and H₂CO₃ using their molecular formulas and atomic masses from the periodic table.
Determine the number of hydrogen ions each acid can donate: For H₂C₂O₄, it can donate 2 H⁺ ions; for HCl, it can donate 1 H⁺ ion; for HNO₃, it can donate 1 H⁺ ion; for H₂CO₃, it can donate 2 H⁺ ions.
Calculate the equivalent weight for each acid: Divide the molar mass of each acid by the number of hydrogen ions it can donate. This will give you the equivalent weight for each acid.
Compare the calculated equivalent weights: Identify which acid has an equivalent weight closest to 63 grams based on your calculations.
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