Purpose: To find number of moles of Fe+3 which react with one mole of NH3OH+ in order to partially balance the equation: NH3OH+ + 2Fe+3 "" ? + 2Fe+2 and to find the missing product. Procedure: H2C2O4 and H2SO4 were titrated with potassium permanganate. The molarity of the permanganate was then found because the molarity of the H2C2O4 and H2SO4 were already known. Then hydroxylammonium chloride and ferric sulfate and water was titrated with known potassium permanganate to get the molarity of the
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(amu) 1 mole f X=atomic mass in grams 1 mole of something = 6.022 x 1023 units of that substance 1 mole of a compound =66.022 x 1023 atoms 6.022 x 1023 amu =1 g 2. What is the mass of 6 atoms of Fe? Answer: 6 atoms of Fe x 55.85 amu÷atom of Fe x 1 g of Fe÷6.022 x 1023 amu = 3. How many atoms does it take to make 1 g of Gold (Au)? Answer: 197.0 g Au =1 mole of Au 1 g of Au=? 1 mole of Au/197 g Au
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Solution: 0.7533g of Na2EDTA mixed with 500ml DI water Table A: Standardization of EDTA Trial | Start Volume | End Volume | Amount of EDTA | 1 | 3.90ml | 29.85ml | 25.95ml | 2 | 5.35ml | 28.35ml | 23.00ml | 3 | 0.45ml | 23.50ml | 23.05ml | Moles
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point and mole ratio of the water to the anhydrous. Every substance has unique characteristics which help to determine the identity of it. The actual values of the properties can be compared to the experimental values. In real life‚ this can be used to determine the unknown medicines. Hypothesis: The hypothesis is that the alum can be verified by finding the properties; the actual melting point of alum is 92.5(http://cookeatshare.com/popular/melting-point-of-alum) and the actual mole ratio of
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1. If atomic mass of Mg atom is 24 g‚ find mass of 1 Mg atom. 2. Find mass of 1 molecule C2H6. (C=12‚ H=1) 3. Find mole of 6‚9 g Na. (Na=23) 4. Find mass of 0‚2 mol P4 . (P=31) 5. Find mole of 4‚48 liters O2 under normal conditions. 6. Find mass of Fe in the compound including 4‚8x1023 O atoms ;Fe3O4 . 7. 1. Find relation between number of molecules of given matters; 8. I. C2H2 that includes 2mol H atom 9. II. CH4 that includes N atoms (N is Avogadro number) 10. III. C3H4 that includes 1‚5 N C atoms
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Stoichiometry Chapter: Some Basic Concepts of Chemistry Mass and Stoichiometry Question 1 2.5 moles of sulphuryl chloride were dissolved in water to produce sulphuric acid and hydrochloric acid. How many moles of KOH will be required to completely neutralize the solution? Ans. SO 2Cl2 + 2H2O H2SO 4 + 2HCl Mol of HCl produced from 2.5 moles of SO2 Cl2 = 5 mol Mol of H2SO 4 produced from 2.5 moles of SO2Cl2 = 2.5 mol H2SO4 + 2KOH HCl + KOH K2SO 4 + 2H2O; KCl + H2 O Now‚ 5 mol of H2SO 4 require
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contains equal numbers of Na‚ O‚ and H atoms. Since this is the case‚ the atom ratio Na:O:H is 1:1:1‚ and so the simplest formula is NaOH. In terms of moles‚ we have one mole of Na‚ 23 grams‚ one mole of O‚ 16 grams‚ and one more of H‚ 1 gram. From this kind of argument we can conclude that the atom ratio in a compound is equal to the mole ratio. We get the mole ratio from chemical analysis‚ and from that the formula of the compound. In this experiment‚ we will use these principles to find the formula
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is known as reaction stoichiometry. In the example above‚ reaction stoichiometry describes the 1:3:2 ratio of molecules of nitrogen‚ hydrogen‚ and ammonia. Stoichiometry can be used to determine quantities such as the amount of products (in mass‚ moles‚ volume‚ etc.) that can be produced with given reactants and percent yield (the percentage of the given reactant that is made into the product). Stoichiometry calculations can predict how elements and components diluted in a standard solution react
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_______ 4) What species is represented by the following information? p+ = 17 2+ A) Ca B) Ar - C) Cl n° = 20 e- = 18 2- D) Ca E) S ____________________________________________________________________________ 5) What mass in grams does 2.87 moles of sodium atoms have? 25 A) 1.39 x 10 B) 66.0 C) 8.01 D) 1.39 x 10 24 E) 1.73 x 10 24 ____________________________________________________________________________ 6) How many potassium atoms are contained in 15 g of potassium? 23 26 24 A) 2.3
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the atoms in a compound o With knowledge of the mass of each individual atom‚ the percentage composition by mass can be determined The Mole (mol) o A counting unit‚ one mole refers to 6.02 x 1023 particles of any given substance o Known as Avogadro’s Constant and given the symbol NA Molar Mass o The molar mass of a substance is the mass of one mole of a particular substance Mass of one particle x 6.02 x 1023 o Coincidentally‚ the molar mass of a substance has the same numerical value
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