---
title: "A student uses a gravimetric acid titration to determine the purity of a solid sample containing \\(\\text{NaHCO}_3\\) and an inert impurity. The mass of the sample is \\(1.05\\text{ g}\\). The student adds a solution that is \\(3.65\\%\\) \\(\\text{HCl}\\) by mass until the endpoint is reached. The mass of the solution dispensed is \\(10.0\\text{ g}\\). The reaction is represented by the following equation.  \\[ \\text{NaHCO}_3\\text{(s)}+\\text{HCl(aq)}\\rightarrow\\text{NaCl(aq)}+\\text{CO}_2\\text{(g)}+\\text{H}_2\\text{O(l)} \\]  Assuming that only \\(\\text{NaHCO}_3\\) reacts with the \\(\\text{HCl}\\), what is the percent by mass of \\(\\text{NaHCO}_3\\) in the sample?"
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url: "https://nerd-notes.com/ubq/119979/"
date_modified: "2026-08-21T08:31:26+00:00"
---

# A student uses a gravimetric acid titration to determine the purity of a solid sample containing \(\text{NaHCO}_3\) and an inert impurity. The mass of the sample is \(1.05\text{ g}\). The student adds a solution that is \(3.65\%\) \(\text{HCl}\) by mass until the endpoint is reached. The mass of the solution dispensed is \(10.0\text{ g}\). The reaction is represented by the following equation.

\[
\text{NaHCO}_3\text{(s)}+\text{HCl(aq)}\rightarrow\text{NaCl(aq)}+\text{CO}_2\text{(g)}+\text{H}_2\text{O(l)}
\]

Assuming that only \(\text{NaHCO}_3\) reacts with the \(\text{HCl}\), what is the percent by mass of \(\text{NaHCO}_3\) in the sample?

A student uses a gravimetric acid titration to determine the purity of a solid sample containing \(\text{NaHCO}_3\) and an inert impurity. The mass of the sample is \(1.05\text{ g}\). The student adds a solution that is \(3.65\%\) \(\text{HCl}\) by mass until the endpoint is reached. The mass of the solution dispensed is \(10.0\text{ g}\). The reaction is represented by the following equation.

\[
\text{NaHCO}_3\text{(s)}+\text{HCl(aq)}\rightarrow\text{NaCl(aq)}+\text{CO}_2\text{(g)}+\text{H}_2\text{O(l)}
\]

Assuming that only \(\text{NaHCO}_3\) reacts with the \(\text{HCl}\), what is the percent by mass of \(\text{NaHCO}_3\) in the sample?

- **A.** \(8.00\%\)
- **B.** \(34.8\%\)
- **C.** \(40.0\%\)
- **D.** \(80.0\%\)

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/119979/*