Adding Concentrations: Solving Homework Problem

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SUMMARY

The discussion focuses on solving a chemistry homework problem involving the calculation of molarity using the formula (C1V1 + C2V2) / (V1 + V2). The user consistently obtained a result of 0.0761 M and confirmed the correct conversion from mL to L. Additionally, the user highlighted the importance of recognizing that one formula unit of sodium sulfate (Na2SO4) contains two sodium ions (Na) per unit, which is crucial for accurate calculations. This clarification ultimately resolved the user's issue.

PREREQUISITES
  • Understanding of molarity and its calculation
  • Familiarity with the concept of solution concentrations
  • Knowledge of unit conversions, specifically mL to L
  • Basic chemistry knowledge regarding ionic compounds, particularly sodium sulfate
NEXT STEPS
  • Review the principles of molarity and solution preparation
  • Study the stoichiometry of ionic compounds, focusing on sodium sulfate
  • Practice unit conversion techniques in chemistry
  • Explore common errors in molarity calculations and how to avoid them
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Chemistry students, educators, and anyone involved in solving concentration-related problems in chemical solutions.

carlodelmundo
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Homework Statement




http://carlodm.com/images/1.png

Homework Equations



I tried using the formula: ( C1V1 + C2V2 ) / (V1 + V2)

The Attempt at a Solution



I keep on getting .0761 M. anything wrong with this? (YES I changed mL to L)
 
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The expression for the resulting formula looks good. Be aware that one formula unit of Na2SO4 , sodium sulfate, has two formula units of Na for each unit of compound.
 
THANK YOU!

That solved my problem!
 

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