LAB 3 Stoichiometry And Chemical Reactions
Practicum 2: Stoichiometry of Chemical Reactions
Written by:
Ade Istianto (2014990003)
Aprizky Bagus Heldinto (2014990002)
Deas Pratama (2014360004)
Paskah Andreas Deo Gratias (2014370005)
Sampoerna University
ABSTRACT
This experiment is endure to determine and study about the stoichiometry of chemical reactions in certain chemicals. The experiments were to make sure student are able to use and learn the Job’s method-the method of continuous variation-for determine the reaction stoichiometry. In the method of continuous variations, the total number of moles of reactants is kept constant for a series of measurements. Each measurement is made with a different mole ratio or mole fraction of reactants. The maximum change will occur when the mole ratio of the reactants is closest to the optimum ratio which is the stoichiometric ratio in the chemical equation. A job plot itself is used to determine the stoichiometry of binding event. This method is widely used in analytical chemistry, instrumental analysis, and advanced chemical equilibrium. In solutions that used in the experiment were two species are present reaction between CuSO4 and NaOH. In this method of experiment, the total molar concentration of the two solutions are held constant, but their mole fractions are varied. In the second experiment, it was observed the reaction of acid-base in solution of NaOH with HCl in different condition of volume for each. An observable that is proportional to complex information is plotted against the mole fractions of these two components. The maximum on the plot correspond to stoichiometry of the solutions or species if sufficiently high concentrations are used.
CHAPTER I
OBJECTIVES
Objectives:
1. To learn the Job’s method (the method of continuous variation).
2. To be able to determine the reaction stoichiometry.
CHAPTER II
METHODOLOGY
2.1 Apparatus
Materials:
Chemicals
Equipment
HCl 1M
Test tube
NaOH 1M
Beaker Glass
NaOH 2M
Graduated Cylinders
CuSO4 1M
Written by:
Ade Istianto (2014990003)
Aprizky Bagus Heldinto (2014990002)
Deas Pratama (2014360004)
Paskah Andreas Deo Gratias (2014370005)
Sampoerna University
ABSTRACT
This experiment is endure to determine and study about the stoichiometry of chemical reactions in certain chemicals. The experiments were to make sure student are able to use and learn the Job’s method-the method of continuous variation-for determine the reaction stoichiometry. In the method of continuous variations, the total number of moles of reactants is kept constant for a series of measurements. Each measurement is made with a different mole ratio or mole fraction of reactants. The maximum change will occur when the mole ratio of the reactants is closest to the optimum ratio which is the stoichiometric ratio in the chemical equation. A job plot itself is used to determine the stoichiometry of binding event. This method is widely used in analytical chemistry, instrumental analysis, and advanced chemical equilibrium. In solutions that used in the experiment were two species are present reaction between CuSO4 and NaOH. In this method of experiment, the total molar concentration of the two solutions are held constant, but their mole fractions are varied. In the second experiment, it was observed the reaction of acid-base in solution of NaOH with HCl in different condition of volume for each. An observable that is proportional to complex information is plotted against the mole fractions of these two components. The maximum on the plot correspond to stoichiometry of the solutions or species if sufficiently high concentrations are used.
CHAPTER I
OBJECTIVES
Objectives:
1. To learn the Job’s method (the method of continuous variation).
2. To be able to determine the reaction stoichiometry.
CHAPTER II
METHODOLOGY
2.1 Apparatus
Materials:
Chemicals
Equipment
HCl 1M
Test tube
NaOH 1M
Beaker Glass
NaOH 2M
Graduated Cylinders
CuSO4 1M