calculation. 1. Write out a balanced "equation" for the process you investigated in Part I‚ including phase symbols. NaOH(s) --> Na+(aq) + OH-(aq) 2. Calculate the number of moles of sodium hydroxide dissolved. Show your work. Moles of NaOH = 2.535 grams NaOH X (1 mol/40.00 grams) = 0.06338 moles NaOH 3. Calculate the amount of energy involved in this dissolving process. Show your work. 205 g H2O c = 4.184 J/gC T2 = 27.8 C T1 = 24.5 C Heat gained by H2O = 205 g X 4.18
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usually‚ photosynthesis rate is expressed as how many moles (actually micromoles) of CO2 does one square meter of leaf assimilate in a second. Basing the rate on a square meter of leaf might seem strange since most leaves are small; nowhere near a square meter in area‚ more like a few square cm. However‚ the meter‚ not the cm‚ is the base unit of length in the SI system‚ and the second‚ not the minute‚ the base unit for time. The reason that moles‚ not volume‚ of CO2 is the unit used when expressing
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phenolphthalein and that of reaction (2) can be indicated by methyl orange. Stoichiometry confines each of the above pH reactions to react according to a mole ratio of 1 : 1. This means‚ say from equation (2)‚ the number of mole of HCl(aq) determined from the methyl orange titration is equal to the number of mole of NaHCO3(aq). Likewise‚ total number of moles of NaOH(aq) and Na2CO3(aq) in the solution mixture can be calculated according to the volumes of HCl(aq) added at the end point Vol. of HCl indicated
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A The % Composition and Empirical Formula of a Hydrate: It Doesn’t Hold Water‚ Or Does It? 1. To determine the percent water in an unknown hydrate. 2. To calculate water(s) of crystallization for an unknown hydrate. 3. To determine the formula of an unknown hydrate. OBJECTIVES SKILLS Proper use of the following equipment: Dial-O-Gram balance (Laboratory Technique I)‚ electronic balance (Laboratory Technique II) and Bunsen burner (Laboratory Technique III). Dial-O-Gram balance‚ electronic
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theory of the simple distillation that temperature “(Raoult’s Law) P total = P (A)N(A) + P(a) N(a)”. It states in general when you have a miscible substance or liquid that you are distillation at certain temperatures‚ the mole ratio of the reactive must be equal to the mole ratio of the product formed by chemical reaction. Materials and Methods Procedure Eugenol experiment begins with 25 grams of whole cloves placed in a flask and added 100 ml of water. Then setup the steam distillation
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obtain in life. Throughout the adventurous journey of the characters‚ Grahame uses the settings‚ themes‚ and symbolic symbols to convey the morals of the novel. The plot of the story stems from the personalities of the four main characters of Toad‚ Mole‚ Rat and Badger. Wealthy‚ Self-centered and opinionated but yet affectionate are words that can be used to describe Toad at the beginning of the novel. Known for his addiction to reckless driving‚ Toad has no concern with people who try to help him
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vividly portrays his love of imperfections by his choice of words. For example "For rose-moles all in stipple upon trout that swims;" by that Gerard Hopkins said that the moles on the trout’s body or scales that he compared with a beautiful rose. We all know that moles sometimes can be ugly and hideous‚ but to Hopkins - he said otherwise. For he saw the trout with moles have a beautiful rose-flowering moles painted all over them. Another example of Hopkins love of things that are not perfect is
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portions of this write-up. YOU WILL NOT BE TURNING IN THE QUESTIONS LISTED BELOW AS SHOWN – RATHER YOU ARE TO INTEGRATE THEM WITHIN YOUR FORMAL LAB WRITE-UP. General Instructions (A Place to Start): 1. Start your lab by making a data sheet. The mole calculations that you will be making when you write up this lab will be based on the data you record before and after the experiment. Be certain that this data is recorded in an organized manner‚ with all the appropriate units included. Be as accurate
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Ion Exchange Chromatography Week 10 TAG Question 1: Chapter 6-4 of your technique book provides a detailed description of how to run a ion- exchange column. Assume you have a cation-exchange column already prepared and ready to use. Create an outline of no more than 10 steps describing how you will regenerate the column‚ load your sample and collect the hydronium ion released. 1. Open the stopcock at the bottom of the column and allow solution to drain out until the solution level in the
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Title: Determination of chloride by the Mohr Method Objective: To determine chloride by using Mohr Method. Introduction: The Mohr method is the method used to determine the chloride ion concentration of a solution by titration with silver nitrate. As the silver nitrate solution is slowly added‚ a precipitate of silver chloride forms. Ag+ + Cl- AgCl(s) (Ksp for AgCl is 1.810-10) The chloride ion (Cl-) is an important anion found in solids and solutions. Chloride is the predominant anion
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