Introduction In this lab‚ the purpose was to verify Hess’s Law. Four main topics were covered during this experiment including enthalpy of reaction‚ heat of formation‚ Hess’s Law‚ and calorimetry. The enthalpy of reaction‚ ΔHrxn is the heat or enthalpy change for a chemical reaction. The energy change is equal to the amount of heat transferred at a constant pressure in the reaction. The change represents the difference in enthalpy of the products and the reactants and is independent of the steps
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Title: Law of Conservation of Mass Purpose: The purpose of the Law of conservation of Mass lab is for me to attempt to verify the Law of Conservation of Mass. Procedure: Acid Base Neutralization 1. Using 2 modified‚ beral pipettes fill pipet an about 1/5 full of white vinegar and pipette B about 1/5 full of 1.0 M NaOh (sodium hydroxide). 2. Place the 2 Pipets on the beam balance and read and record the total mass of the 2 pipets. 3. Carefully telescope the stem of
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ATENEO CENTRAL BAR OPERATIONS 2007 Criminal Law SUMMER REVIEWER BOOK I CRIMINAL LAW – A branch of municipal law which defines crimes‚ treats of their nature and provides for their punishment. Characteristics of Criminal Law: 1. General – binding on all persons who reside or sojourn in the Philippines Exceptions: a. Treaty Stipulation b. Laws of Preferential Application c. Principles of Public International Law Ex: i. sovereigns and other chiefs of state ii. Ambassadors‚ ministers plenipotentiary
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9.5 – 5.0 = 4.5. Therefore 4.5 mL of NaOH was needed to neutralize HCl. Table 3: The amount of NaOH (mL) needed to neutralize HCl in Condition 1‚ 2 ‚ and 3 and their 3 trials. Trial 1 (mL) Trial 2 (mL) Trial 3 (mL) Condition 1 4.5 4.0 4.0 Condition 2 8.0 8.0 9.0 Condition 3 9.5 9.0 9.5 2. Sample Average Calculation of Condition 1: Table 4: The average volume (mL) of HCl & NaOH in each Condition Average Volume of HCl & NaOH Condition 1 9.2 Condition 2 16.5
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Purpose: The purpose of the experiment is to calculate the enthalpy change occurring in the first of reaction of sodium hydroxide with hydrochloric acid and sodium hydroxide with ammonium chloride. Using Hess’ Law and the results for the enthalpy change of the first two reactions should give the enthalpy change of the third reaction of ammonia with hydrochloric acid. Procedure: Part 1: Construct a calorimeter of two nested stereophony cups where the cover has a hole to fir a thermometer. Measure
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Purpose: The purpose of this lab is to identify the presence of cations and anions in four unknown solutions by identifying whether they are copper‚ silver‚ iron‚ or chloride ions which is done by adding sodium hydroxide‚ solid copper‚ silver nitrate‚ and potassium thiocyanate to the solutions and analyzing the chemical reactions. Introduction: Chemical change‚ unlike physical change is the change in the composition of a substance rather than simply its shape‚ size‚ or state (Marie‚ 2015). Signs
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Tale of the Eloquent Peasant‚ and an Assyrian Law and a Palace Decree essentially discusses the relationship between justice and the law in the individual civilizations. Each bring out different understandings of the communities on how justice applies in society as well as how we refer to such laws today. Hammurabi’s code refers to the set of rules or laws that were put into place by the Babylonian king: Hammurabi. Setting the basis for most modern laws‚ this code was meant to provide a sense of direction
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Name: Allison Bynum Date:6/17/14 Exp 8: Ionic Reactions Lab Section: 75426 Data Table: Record your observations in the following table Na3PO4 NaI Na2SO4 NaCl NaHCO3 Na2CO3 NaOH Co(NO3)2 Created a musty looking cloud that later turned dye to a purple shade No change‚ brought out pink very slightly No change No change Created a cream looking liquid‚ did not mix with pink substance Darkened color‚ changing to more of a purple tint as time passes on. Immediately turned
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using the stirring rod‚ and then the magnetic stirring bar was placed in the beaker for further dissolve when measuring the pH. The pH meter was used to measure the solution‚ and the data was documented at pH 4.6. This was the starting point. Next‚ 1M NaOH was slowly added into the buffer to make it to pH 6. Then‚ the buffer was transferred to a 1000 mL graduated cylinder‚ and 125mL of distill water was added to the buffer.
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r Lab Report 5 Introduction to the Classes of Chemical Reactions Course: Chem. 1151L‚ Tuesday & Thursday June 23‚ 2011 Mr. Nasir Uddin Pre Lab Questions: 1. CaBr2 (aq) + K3PO4 (aq) → CA(PO4)2(S) + KBr (aq) = Ca3(PO4)2 + 6 KBr Double Replacement 2. Li(s) + O2(g) = Li2O(s) =2 Li2O Decomposition 3. CH4 + O2 = CO2 + H2O = CO2 + 2 H2O Combination 4. AgBr(s) = Ag (s) + Br2(l) = 2 Ag + Br2 Combination 5. Mg(s) + H2SO4 (aq) = MgSO4 + H2
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