Finding the excess after the reaction is complete (chem 101)

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Discussion Overview

The discussion revolves around a chemistry problem involving the reaction between Ammonium Phosphate and Ferrous Acetate. Participants are focused on determining the grams of the reactant in excess after the reaction is complete, including calculations related to moles and theoretical yields.

Discussion Character

  • Homework-related
  • Mathematical reasoning
  • Technical explanation

Main Points Raised

  • One participant identifies Ferrous Acetate as the limiting reactant and provides a theoretical yield of 0.09g for it, while stating that Ammonium Phosphate has a theoretical yield of 0.54g.
  • Another participant suggests writing the reaction equation and calculating the moles of each reactant and product.
  • A balanced reaction equation is provided by a participant, indicating the stoichiometric coefficients involved.
  • Participants discuss the need to calculate the number of moles of products formed and how many moles of each reactant were consumed during the reaction.
  • There is a reference to using the concentration definition to find the number of moles of substances involved.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus on the method to find the grams of the reactant in excess, as there are multiple suggestions and requests for clarification on calculations.

Contextual Notes

Participants express uncertainty about the steps needed to calculate the moles of products and reactants consumed, indicating potential gaps in understanding stoichiometric relationships and mole calculations.

Who May Find This Useful

Students studying introductory chemistry, particularly those working on stoichiometry and reaction yield calculations.

legendarium
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When 2.0mL of 1.5M Ammonium Phosphate is mixed with 1.00 mL of 0.75 M Ferrous Acetate.


The problem itself is in multiple parts.
I have already found the limited reactant. But i need help finding "the grams of the reactant in excess after the reaction is complete."

What i have so far...
Ferrous Acetate is limiting reactant with theoretical yield of of 0.09g.
Ammonium Phosphate has 0.54g of a theoretical yield.


The Attempt at a Solution



I have attempted this multiple times and have been searching the web as to how to do it...no positive results so far.
 
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Write reaction equation.

How many moles of each reactant?

How many moles of product?

How many moles of each reactant was consumed during the reaction?

--
 
balanced equation:
2(NH4)3PO4 +3Fe(C2H202)2 -> 6NH4(C2H202) + Fe2(PO4)2

Im not sure how to obtain the rest of what you are asking.
 
I already told you in the other thread. You know volume and concentration - start with concentration definition, solve for number of moles of substance.
 
We have
3e-3 moles of Ammonium Phosphate and
7.5e-4 moles of Ferrous Acetate

How do i find how many moles of the product i have and how many moles are consumed?
 
Time to write and use reaction equation. You need to know what are stoichiometric coefficients.

I think I have already directed you to the page where I explained how to read reaction equation.

--
methods
 
Yes, thank you.
 

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