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
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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
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Theoretical Yield 4. Actual Yield 5. Percent Yield 6. Excess Reagent 7. Limiting Reagent 8. Law of Conservation of Matter Short Answer – explain the following: 9. What is conserved in every balanced equation (multiple answers)? 10. What determines the mole ratio in a balanced equation? 11. What is the proper method to determine limiting reagents? 12. What is the relationship between the masses of products and reactants? Practice problems: 13. Using the following equation: Fe2O3 + 3CO 3CO2 +
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I came to Lusher in the 8th grade. That was when I first heard that moles were an unattractive quality. I was in art class quietly painting with my soft-bristled brush coated in liquid red when I overheard a classmate ask their friend what they found attractive in girls. The brown-haired boy first listed what he found attractive in girls‚ such as a nice smile‚ clear skin‚ and large assets. Although after he listed the appealing aspects of what he associated with girls‚ he listed the “beastly” qualities
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Na2SO4 D. NaCl‚ Na2S‚ Na2SO4 E. NaCl‚ Na2SO4‚ Na2S 25. The following unbalanced equation represents a reaction that occurs in basic solution: MnO41– + C2O42– → MnO2 + CO32– How many moles of MnO41– are required to produce 1 mole of CO32–? A. 4 B. 3 C. 2 D. 0.67 E. 0.33 26. Given reaction 2NH3(g) + 3Cl2(g) → N2(g) + 6HCl(g)‚ you react 5.0 L of NH3 with 5.0 L of Cl2 measured at the same conditions
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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
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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
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“Dreams of the Animals” by Margaret Atwood represents the nature of animals’ dreams. They mostly dream of other animals “each according to its kind”‚ moles dream of “mole smells”‚ and frogs dream of “green and golden/ frogs”. The word “mostly” is used here. Why? That’s because there are exceptions. The poem later states that “certain mice and small rodents/ have nightmares of a huge pink/ shape with five claws descending”. The word “nightmare” doesn’t only mean a bad dream when sleeping‚ but also
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stoichiometric amounts of the acid and base have combined is the equivalence point. An example of this is shown in the equation: HCl(aq)+NaOH(aq)NaCl(aq)+H2O(l). The number of moles is given by knowing the exact concentration and volume added of the titrant. The latter‚ in turn‚ is related by stoichiometry to the number of moles of acid initially present in the unknown. To detect the equivalence point‚ indicators are usually added to acid-base titrations. The point at which the indicator changes color
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of the other solution. The following steps tell how to calculate the unknown concentration: 1. Write the balanced equation for the reaction. From the coefficients‚ determine how many moles of acid reacts with 1 mole of base (or vice versa). Use the coefficients to form a mole ratio. 2. If the mole ratio is 1:1‚ the following relationship can be used to calculate the unknown concentration: Ma x Va = Mb x Vb Where Ma =
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