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Aspirin Tablet Titration Quiz

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Questions and Answers

What is the balanced chemical equation for the reaction between acetyl salicylic acid (HAS) and sodium hydroxide (NaOH)?

$HAS(aq) + 2NaOH(aq) ightarrow H2O(ℓ) + Na2AS(aq)$
$2HAS(aq) + 2NaOH(aq) ightarrow 2H2O(ℓ) + 2NaAS(aq)$
$HAS(aq) + NaOH(aq) ightarrow H2O(ℓ) + 2NaAS(aq)$
$HAS(aq) + NaOH(aq) ightarrow H2O(ℓ) + NaAS(aq)$ (correct)

Why is aspirin considered a weak electrolyte?

Because it does not conduct electricity at all
Because it has a low molecular weight
Because it is weakly acidic (correct)
Because it is weakly basic

What is the purpose of titration in determining the amount of aspirin and inert binder in a tablet?

To combine substances using volumetric glassware in a carefully controlled way
To determine the pH of the aspirin tablet
To calculate the concentration of NaOH solution used in the reaction
To measure the exact amounts needed to react aspirin and inert binder (correct)

Why is it important to be careful with burets in a titration process?

<p>Burets are expensive and need to be handled with care (B)</p> Signup and view all the answers

What problem does the reaction of NaOH with atmospheric carbon dioxide present in the titration process?

<p>It increases the concentration of NaHCO3 in solution (C)</p> Signup and view all the answers

Flashcards

Reaction of acetyl salicylic acid (HAS) and sodium hydroxide (NaOH)

HAS(aq) + NaOH(aq) → H2O(ℓ) + NaAS(aq)

Aspirin as a Weak Electrolyte

Aspirin is a weak acid, so it only partially dissociates into ions in solution.

Purpose of Titration

Titration measures the exact amounts of reactants needed for a complete reaction between aspirin and the titrant.

Burets in Titration

Burets are precision glassware used to accurately dispense liquids during titration.

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NaOH and Atmospheric CO2

Atmospheric carbon dioxide reacts with NaOH to form NaHCO3, increasing the concentration of NaHCO3 in the solution and affecting titration accuracy.