---
title: "A student synthesizes calcium oxalate in two reactions. In the first reaction, nitric acid is added to excess calcium carbonate. After the reaction stops, the remaining solid is removed by filtration.  \\[ \\text{CaCO}_3\\text{(s)}+2\\text{HNO}_3\\text{(aq)}\\rightarrow \\text{Ca(NO}_3\\text{)}_2\\text{(aq)}+\\text{CO}_2\\text{(g)}+\\text{H}_2\\text{O(l)} \\]  The entire filtrate is then combined with sodium oxalate solution.  \\[ \\text{Ca(NO}_3\\text{)}_2\\text{(aq)}+\\text{Na}_2\\text{C}_2\\text{O}_4\\text{(aq)}\\rightarrow \\text{CaC}_2\\text{O}_4\\text{(s)}+2\\text{NaNO}_3\\text{(aq)} \\]  | Substance | Mass used or collected | Molar mass | |—|—:|—:| | \\(\\text{CaCO}_3\\) | \\(20.0\\text{ g}\\) | \\(100\\text{ g/mol}\\) | | \\(\\text{HNO}_3\\) | \\(18.9\\text{ g}\\) | \\(63.0\\text{ g/mol}\\) | | \\(\\text{Na}_2\\text{C}_2\\text{O}_4\\) | \\(8.04\\text{ g}\\) | \\(134\\text{ g/mol}\\) | | \\(\\text{CaC}_2\\text{O}_4\\) | \\(6.14\\text{ g}\\) collected | \\(128\\text{ g/mol}\\) |  Which pair gives the theoretical yield of \\(\\text{CaC}_2\\text{O}_4\\) and the overall percent yield of the sequence?"
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url: "https://nerd-notes.com/ubq/120102/"
date_modified: "2026-08-21T08:41:36+00:00"
---

# A student synthesizes calcium oxalate in two reactions. In the first reaction, nitric acid is added to excess calcium carbonate. After the reaction stops, the remaining solid is removed by filtration.

\[
\text{CaCO}_3\text{(s)}+2\text{HNO}_3\text{(aq)}\rightarrow \text{Ca(NO}_3\text{)}_2\text{(aq)}+\text{CO}_2\text{(g)}+\text{H}_2\text{O(l)}
\]

The entire filtrate is then combined with sodium oxalate solution.

\[
\text{Ca(NO}_3\text{)}_2\text{(aq)}+\text{Na}_2\text{C}_2\text{O}_4\text{(aq)}\rightarrow \text{CaC}_2\text{O}_4\text{(s)}+2\text{NaNO}_3\text{(aq)}
\]

| Substance | Mass used or collected | Molar mass |
|—|—:|—:|
| \(\text{CaCO}_3\) | \(20.0\text{ g}\) | \(100\text{ g/mol}\) |
| \(\text{HNO}_3\) | \(18.9\text{ g}\) | \(63.0\text{ g/mol}\) |
| \(\text{Na}_2\text{C}_2\text{O}_4\) | \(8.04\text{ g}\) | \(134\text{ g/mol}\) |
| \(\text{CaC}_2\text{O}_4\) | \(6.14\text{ g}\) collected | \(128\text{ g/mol}\) |

Which pair gives the theoretical yield of \(\text{CaC}_2\text{O}_4\) and the overall percent yield of the sequence?

A student synthesizes calcium oxalate in two reactions. In the first reaction, nitric acid is added to excess calcium carbonate. After the reaction stops, the remaining solid is removed by filtration.

\[
\text{CaCO}_3\text{(s)}+2\text{HNO}_3\text{(aq)}\rightarrow \text{Ca(NO}_3\text{)}_2\text{(aq)}+\text{CO}_2\text{(g)}+\text{H}_2\text{O(l)}
\]

The entire filtrate is then combined with sodium oxalate solution.

\[
\text{Ca(NO}_3\text{)}_2\text{(aq)}+\text{Na}_2\text{C}_2\text{O}_4\text{(aq)}\rightarrow \text{CaC}_2\text{O}_4\text{(s)}+2\text{NaNO}_3\text{(aq)}
\]

| Substance | Mass used or collected | Molar mass |
|---|---:|---:|
| \(\text{CaCO}_3\) | \(20.0\text{ g}\) | \(100\text{ g/mol}\) |
| \(\text{HNO}_3\) | \(18.9\text{ g}\) | \(63.0\text{ g/mol}\) |
| \(\text{Na}_2\text{C}_2\text{O}_4\) | \(8.04\text{ g}\) | \(134\text{ g/mol}\) |
| \(\text{CaC}_2\text{O}_4\) | \(6.14\text{ g}\) collected | \(128\text{ g/mol}\) |

Which pair gives the theoretical yield of \(\text{CaC}_2\text{O}_4\) and the overall percent yield of the sequence?

- **A.** The theoretical yield is \(7.68\text{ g}\), and the overall percent yield is \(79.9\%\).
- **B.** The theoretical yield is \(7.68\text{ g}\), and the overall percent yield is \(125\%\).
- **C.** The theoretical yield is \(15.4\text{ g}\), and the overall percent yield is \(40.0\%\).
- **D.** The theoretical yield is \(19.2\text{ g}\), and the overall percent yield is \(32.0\%\).

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/120102/*