How to Find Initial Moles of Reactants for Given Reaction | Moles Homework

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SUMMARY

The discussion focuses on calculating the initial number of moles of reactants for the reaction H2O2 + 2I- + 2H+ → 2H2O + I2. The provided concentrations and volumes for potassium iodide (0.2 mol/L, 10 mL), sulfuric acid (0.5 mol/L, 5 mL), and hydrogen peroxide (0.02 mol/L, 5 mL) are essential for the calculations. The formula n = C x V is used to determine the moles, and it is clarified that stoichiometric coefficients should not be applied in this initial calculation.

PREREQUISITES
  • Understanding of molarity and volume calculations
  • Familiarity with the equation n = C x V
  • Basic knowledge of chemical reactions and stoichiometry
  • Concept of reactants and products in a chemical equation
NEXT STEPS
  • Practice calculating moles using different concentrations and volumes
  • Explore stoichiometric coefficients in balanced chemical equations
  • Learn about limiting reactants in chemical reactions
  • Investigate the implications of concentration changes on reaction rates
USEFUL FOR

Chemistry students, educators, and anyone involved in chemical calculations or stoichiometry. This discussion is particularly beneficial for those tackling homework related to reaction stoichiometry and mole calculations.

anthonych414
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Homework Statement



We are given a reaction: H2O2 + 2I- + 2H+ → 2H2O + I2 and are asked to find the initial number of moles of each reactant.

V=10mL and C=0.2 mol/L for potassium iodide in the solution.
V=5mL and C=0.5 mol/L for sulfuric acid in the solution.
V=5mL and C=0.02 mol/L for hydrogen peroxide in the solution.


Homework Equations



n=CxV where n is the number of moles, C is the concentration, and V is the volume.

The Attempt at a Solution



I know we need to use the equation stated above but should we multiply by the coefficient or not?
 
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You mean stoichiometric coefficients? No, just calculate concentration as if you were not knowing what the solution will be used for.
 

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