endpoint. If this did occur‚ then the volumes of hydrochloric acid used to neutralize the sodium carbonate would be too great. This‚ in return‚ would erroneously decrease the molarity of the hydrochloric acid since the volume would increase while the moles of hydrochloric acid used would stay
Premium Measurement Test method Accuracy and precision
Unit 16 Study Guide 1. Which of the following statements concerning equilibrium is not true? A) A system that is disturbed from an equilibrium condition responds in a manner to restore equilibrium. B) Equilibrium in molecular systems is dynamic‚ with two opposing processes balancing one another. C) The value of the equilibrium constant for a given reaction mixture is the same regardless of the direction from which equilibrium is attained. D) A system moves spontaneously
Premium Chemical reaction Chemistry Chemical equilibrium
Laboratory report Aluminum Copper Alloy MSCI 300 – Thermodynamics of Materials Alexandre de Freitas Silveira Eau Claire December 18th‚ 2012. Abstract: At this experiment‚ the composition of an alloy of Aluminum Copper was analyzed via X-Ray Fluorescence. From this‚ it was possible to construct a phase diagram a make some predictions about the possible phases presents at considering the 3 samples used in this experiment‚ the samples prepared at this experiment the sample as delivered
Premium Phase Solubility Solid
And since AgNO3 is a one to one mole ratio the number of moles of Ag ions can be calculated. Then once more the moles of Ag ions equal moles of Cl- because once again there is a one to one mole relationship. From all of that the concentration of Cl- can be found by moles divided by liters which declined with every titration because less and less solution was needed. After the molarity of the Cl- is found
Premium Thermodynamics Energy Entropy
vinegar to produce carbon dioxide‚ water‚ and calcium acetate as represented by the equation: CaCO3 + 2HC2H3O2 CO2 + H2O + Ca(C2H3O2)2. The calcium carbonate reacts with the acetic acid in a 1:2 ratio. Therefore‚ for every one mole of calcium carbonate that reacts‚ 2 moles of acetic acid have reacted as well. Materials: 1. Broken eggshells 2. 2 125 mL flasks 3. Stirring rod 4. 25 mL vinegar 5. Filter paper 6. Funnel 7. Electronic balance 8. Paper towels 9. Weighing paper Procedure: 1
Premium Acetic acid Calcium carbonate
Lecture 12 Chapter 6 6.1 Thermochemistry: Energy & units (p.227) From observation we know‚ that - some chemical reactions begin as soon as the reactants come into contact with each other (precipitation reactions) - some reactions are slow or even so slow at room temperature that even lifetime is not enough to observe a measurable change (rusting of iron‚ tarnishing silver) Also‚ almost all chemical reactions involve exchange of heat (or energy): in combustion reactions
Premium Energy Thermodynamics
Using the Iodine clock method to find the order of a reaction Introduction When peroxodisulfate (VI) ions and iodide ions react together in solution they form sulfate (VI) ions and iodide. This reaction is shown below: S2O82-aq+ 2I-aq SO42-aq+ I2(aq) The reactants and the sulfate (VI) ions are colourless however the Iodine is a yellow/brown colour. This allows you to measure the progress of the reaction through the colour change when the iodine is produced. In order to determine the order of
Premium Chemical reaction Chemistry Reaction rate
10/19/2011 Akruti Patel Lab Report #4: Determination of a chemical formula: the empirical formula of Magnesium Oxide 1. Purpose: Determine the empirical formula of magnesium oxide from the percent composition (this can found using the Analytical Method and the Synthesis Method). 2. Introduction: In the late eighteenth century‚ combustion has been studied extensively. In fact‚ according to Steven and Susan Zumdahl‚ Antoine Lavoisier‚ a French Chemist‚ performed thousands of combustion experiments
Premium Oxygen Magnesium Chemistry
Jamie Hamill Lab: Water Conductance Week: # 4 WATER CONDUCTANCE Introduction The purpose of this week 4 iLab was to find the unknown concentration of a NaCl solution using a standard curve of conductivity. Because water contains very few ions it does not conduct electricity very well. When NaCl solution is dissolved in water‚ the solution conducts very well‚ because the solution contains ions. The ions come from the table salt‚ whose chemical name is sodium chloride. Sodium chloride
Premium Sodium chloride Salt Sodium
0.787g Na2CO3 1.336g H2O Moles of Na2CO3 = 0.787/106 = 0.00742moles Moles of H2O = 1.336/18 = 0.0742 Molar Ratio = 10 moles of H2O‚ 1 moles of Na2CO3 Abstract: The purpose of this experiment is to find out the structure of the compound of alum through two tests. By determining the melting point of alum‚ and by determining the water of hydration in alum crystals by comparing the molar ratio between moles of AlK(SO4)2 and moles of H2O‚ the structure of the compound
Premium Water Alum Chemistry