To determine the molar mass of an organic acid, HA, we titrate 1.034 g of HA with standardized NaOH. Calculate the molar mass of HA assuming the acid reacts with 32.25 mL of 0.533 M NaOH according to the equationHA(aq) + NaOH(aq) → NaA(aq) + H₂O(l)SubmitTUTOR STEPg/mol HASubmit AnswerShow Approach Hide Tutor StepsYou know the mass of the sample of unknown acid and the volume and concentration of NaOH(aq). From the equation given, you also know that the acid and the base react in a 1:1 ratio.<Next> (What do you know?)Try Another Version10 item attempts remainingApproachStep 1Write the balanced equation for the reaction. Note from the coefficients that the acid and base react in equal molar proportions.Step 2Determine the amount (mol) of base reacting by multiplying the volume (L) of the base by the molarity (mol/L) of the base.Step 3Because one mole of acid reacts per mole of base, the amount (mol) acid present equals the amount (mol) base used in the titration.Step 4Divide the mass (g) of acid used by the amount (mol) present to obtain the molar mass (g/mol).

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To determine the molar mass of an organic acid, HA, we titrate 1.034 g of HA with standardized NaOH. Calculate the molar mass of HA assuming the acid reacts with 32.25 mL of 0.533 M NaOH according to the equation HA(aq) + NaOH(aq) → NaA(aq) + H₂O(l) g/mol HA

To determine the molar mass of an organic acid, HA, we titrate 1.034 g of HA with standardized NaOH. Calculate the molar mass of HA assuming the acid reacts with 32.25 mL of 0.533 M NaOH according to the equation HA(aq) + NaOH(aq) → NaA(aq) + H₂O(l) g/mol HA

Chemistry

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ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Concept explainers

Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.

Question

To determine the molar mass of an organic acid, HA, we titrate 1.034 g of HA with standardized NaOH. Calculate the molar mass of HA assuming the acid reacts with 32.25 mL of 0.533 M NaOH according to the equation
HA(aq) + NaOH(aq) → NaA(aq) + H₂O(l)
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TUTOR STEP
g/mol HA
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Show Approach Hide Tutor Steps
You know the mass of the sample of unknown acid and the volume and concentration of NaOH(aq). From the equation given, you also know that the acid and the base react in a 1:1 ratio.
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Approach
Step 1
Write the balanced equation for the reaction. Note from the coefficients that the acid and base react in equal molar proportions.
Step 2
Determine the amount (mol) of base reacting by multiplying the volume (L) of the base by the molarity (mol/L) of the base.
Step 3
Because one mole of acid reacts per mole of base, the amount (mol) acid present equals the amount (mol) base used in the titration.
Step 4
Divide the mass (g) of acid used by the amount (mol) present to obtain the molar mass (g/mol).

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