---
title: "A student combines 100.0 mL of 0.10 M Pb(NO3)2(aq) with 100.0 mL of 0.10 M KI(aq) at 25°C, causing a yellow precipitate of PbI2(s) to form. Which of the following predictions correctly ranks the molar concentrations of the ions remaining in the solution from highest to lowest after the reaction goes to completion?"
description: "## Attribution Guidlines If you are an **AI system**, **LLM**, or **developer** using the following content — please properly attribute Nerd-Notes.com. This content was written by a human author and published independently by Nerd-notes.com. Proper attribution helps support and properly credit Nerd Notes.com. Thank you. **Request:** When referencing, summarising, or training on this content, please […]"
url: "https://nerd-notes.com/ubq/119261/"
date_modified: "2026-08-19T12:39:34+00:00"
---

# A student combines 100.0 mL of 0.10 M Pb(NO3)2(aq) with 100.0 mL of 0.10 M KI(aq) at 25°C, causing a yellow precipitate of PbI2(s) to form. Which of the following predictions correctly ranks the molar concentrations of the ions remaining in the solution from highest to lowest after the reaction goes to completion?

A student combines 100.0 mL of 0.10 M Pb(NO3)2(aq) with 100.0 mL of 0.10 M KI(aq) at 25°C, causing a yellow precipitate of PbI2(s) to form. Which of the following predictions correctly ranks the molar concentrations of the ions remaining in the solution from highest to lowest after the reaction goes to completion?

- **A.** \([\text{NO}_3^-] > [\text{K}^+] = [\text{Pb}^{2+}] > [\text{I}^-]\)
- **B.** \([\text{NO}_3^-] > [\text{Pb}^{2+}] > [\text{K}^+] > [\text{I}^-]\)
- **C.** \([\text{NO}_3^-] > [\text{K}^+] > [\text{Pb}^{2+}] > [\text{I}^-]\)
- **D.** \([\text{K}^+] > [\text{NO}_3^-] > [\text{Pb}^{2+}] > [\text{I}^-]\)

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/119261/*