To get the amount of excess reagent left over you must take the moles excess reactant you started with and subtract moles of excess reagent you used .

Question

BlackTom AI · Accepted Answer

In stoichiometry problems involving excess reagent, the goal is to determine how much of the excess reagent remains after the reaction.
Option 1: 'moles excess reactant you started with' corresponds to the initial amount of the excess reagent before the reaction occurs. This is the starting quantity from which we will subtract the amount that actually reacted.
Option 2: 'moles of excess reagent you used' represents the portion of the excess reagent that has been consumed during the reaction (i.e., the amount that has reacted). Subtracting this from the initial amount gives the leftover amount of the excess reagent.
Together, these two quantities are the key components of the calculation: initial moles of the excess reagent minus moles of the excess reagent that reacted equals moles of excess reagent remaining. If either piece is misidentified— for example, subtracting the wrong term or using the amount of reagent that did not react— the result would be incorrect.
Note that in some scenarios, the 'moles of excess reagent used' could be phrased as 'moles of excess reagent that reacted' or 'moles consumed' to emphasize that only the portion that participated in the reaction is subtracted from the initial amount.
No other quantities are required for this particular calculation, since the leftover amount is defined by the difference between what you started with and what was consumed.

1A W25 VidQuiz: Limiting Reagents

To get the amount of excess reagent left over you must take the moles excess reactant you started with and subtract moles of excess reagent you used .

View Explanation

Log in for full answers

Similar Questions

What amount of Al2O3 is produced from the reaction of 3.0 mol Al with 2.0 mol Fe2O3? 2Al + Fe2O3 è Al2O3 + 2Fe

The limiting reagent for a given reaction can be recognized because it is the reagent that

The limiting reagent is not always the lowest number of moles present at the start of the reaction. It is the reactant that causes the least amount of product to be made.

If a reaction goes to completion how much of the limiting reagent will there be left?

What is the limiting reagent in each run? Read the introductory materials carefully!

Based on the balanced equation, 4P4 + 5S8 → 4P4S10 calculate the moles of excess reactant that are left over when 0.420 mol of P4 molecules and 0.737 mol of S8 molecules react?

In a consumer society, many adults channel creativity into buying things

More Practical Tools for Students Powered by AI Study Helper

Homework AI Solver

Stylized AI Paper Writer

Plagiarism Checker Assistant

Citation AI Academic Writing Tool

In-Class Translation Assistant

AI Note Generator

AI Quiz Answers

Past Exam Questions from University Test Bank

Smart Practice Assistant

Adaptive Practice

Making Your Study Simpler