How do i calculate the number of equivalents of h2c4h4o4 titrated?
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To calculate the number of equivalents of H2C4H4O4 (oxalic acid) titrated, you need to consider its acid-base properties and the balanced chemical equation for the reaction.
Step 1: Write the balanced chemical equation.
The chemical equation for the reaction between oxalic acid and the base during titration is:
H2C4H4O4 + 2NaOH -> Na2C4H4O4 + 2H2O
Step 2: Determine the stoichiometry of the reaction.
From the balanced equation, you can see that 1 mole of oxalic acid (H2C4H4O4) reacts with 2 moles of sodium hydroxide (NaOH).
Step 3: Convert the amount of H2C4H4O4 from grams or moles to equivalents.
The number of equivalents is a measure of the reactive capacity of a substance. For acids, one equivalent is defined as the amount of acid that can donate one mole of protons (H+ ions). Since oxalic acid has two acidic moles per mole of the compound, you need to multiply the number of moles of oxalic acid by 2 to obtain the number of equivalents.
Step 4: Perform the calculation.
To calculate the number of equivalents, follow these steps:
1. Determine the molar mass of oxalic acid (H2C4H4O4).
2. Convert the mass of oxalic acid titrated to moles using the molar mass.
3. Multiply the number of moles by 2 to obtain the number of equivalents.
Example:
Suppose you have titrated 0.25 grams of oxalic acid (H2C4H4O4).
1. The molar mass of H2C4H4O4 is approximately 90.03 g/mol.
2. Convert the mass to moles:
Moles of H2C4H4O4 = Mass (g) / Molar mass (g/mol) = 0.25 g / 90.03 g/mol ≈ 0.00277 mol.
3. Calculate the number of equivalents:
Number of equivalents = Moles of H2C4H4O4 x 2 = 0.00277 mol x 2 ≈ 0.00554 equivalents.
Therefore, if you titrated 0.25 grams of oxalic acid, you would have approximately 0.00554 equivalents of H2C4H4O4.