the number of moles of HCl reacted with the NaOH is 0.00216 moles‚ which is less than Gaviscon. The number of moles of NaOH that were added from the burette is 0.00327 moles (1 tablet of Gaviscon). However‚ for Quick-eze‚ the number of moles is 0.00216 moles (1 tablet). This means the average volume of the NaOH have affected the number of moles as the concentration of the sodium hydroxide is 0.1M. This means that if less NaOH was required to neutralise the acid‚ the number of moles of HCl neutralized
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100 mL gas (g) 0.274g 0.361g 0.100g c Molecular weight of the gas (g/mole) 44.10g/mol 58.12g/mol 16.04g/mol d Number of moles in the 100 mL sample 0.0062mol 0.0062mol 0.0062mol Average of all 3 gases: (0.0062+0.0062+0.0062) / 3 = 0.0062 2. To verify Avogadro’s Law‚ calculate the average number of moles for the three gases along with the percent deviation for each gas‚ according to the formula: % deviation = |(moles of gas) - (average for all gases)| / (average for all gases) * 100%
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Thermochemistry Lab #2 - Heat of Reaction - Hess’s Law Return The foundation of the study of thermochemistry was laid by the chemist Germain Hess‚ who investigated heat in chemical reactions during the last century. One statement of the law that bears Hess’s name says: The enthalpy change for any reaction depends on the products and reactants and is independent of the pathway or the number of steps between the reactant and product. In this experiment‚ you will measure and compare
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and about her life‚ that how she struggles about her boyfriend - Pedro marries her sister - Rosaura‚ worries about life of children of Pedro and Rosaura and John who really loves her. The kitchen she can control of‚ food like Ox-Tail Soup and Turkey Mole with Almonds and Sesame Seeds that she loves which these three symbols show what it means to be happy and powerful. The kitchen Tita loved so much represents an important place to Tita. Tita’s domain was the kitchen from the day that Tita’s birth.
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Teresa Meng‚ Niharika Palakodety‚ Victoria Wang‚ and Grace Xiong Mrs. Rhonda Smith Honors Chemistry Period 4 13 May 2012 Redox Reactions Lab Report We wished to investigate the oxidation number of a metal that would form aqueous ions when reacted with an aqueous nitrate salt. For this purpose‚ we chose to investigate the reaction of solid copper metal‚ in the form of a wire‚ with aqueous silver nitrate. Before we began the lab‚ we hypothesized that when silver nitrate‚ AgNO3‚ reacts with
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Compleximetric Determination of Water Hardness Caindec‚ Patricia Ysabel B. Water hardness is a measure of the amount of calcium and magnesium carbonate dissolved as Ca 2+ and Mg 2+ in water. There are no health hazards associated with water hardness‚ however‚ it causes scaling‚ as well as forming of soap suds. Compleximetric titration is one of the best ways of measuring total water hardness using a standard ethylenediaminetetraacetic acid (EDTA) solution. EDTA solution is used as it has the
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NaOH(aq) Equation: C6H4COOH.COOK + NAOH → C6H4COOK.COONa Ratio of Reactants: 1 : 1 1 mole of Potassium Hydrogen Phthalate (C6H4COOH.COOK) reacts with 1 mole of Sodium Hydroxide (NAOH). Concentration of NaOH = Weight of Potassium Hydrogen Phthalate Volume of NaOH (dm3) × Molar Mass of Potassium
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this experiment is to determine the atomic mass of each metal and the percent composition of a known mass aluminum-zinc alloy by determining the moles of H2 gas formed. Zn(s) + 2HCl(aq) → ZnCl2(aq) + H2(g) 1 mole of H2(g) is produced for every 1 mole of Zn(s) 2. 2Al(s) + 6HCl(aq) → 2AlCl3(aq) + 3H2(g) 3 moles of H2(g) is produced for every 2 moles of Al(s) Both the aluminum and the zinc contained in the alloy react to produce hydrogen gas. The reaction occurs in a test tube and generates
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Name:_________________________ MASS AND MOLE RELATIONSHIPS IN A CHEMICAL REACTION PRE-LAB QUESTIONS 1. Balance the equation for the reaction of barium chloride with silver nitrate. 2. Predict the mole ratio of BaCl2 to AgCl for the equation. 3. If an experiment with 10.2 g barium chloride produced 14.5 g silver chloride‚ calculate the experimental mole ratio of silver chloride to barium chloride. Name:_______________________
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the amount of moles of each. To find the amount of moles we must solve for them: Zinc = (2.4375g / 1) X (1 / 65.38g) = 3.73 X 10-2 moles Copper = (0.0625g / 1) X (1 / 63.546g) = 9.835 X 10-4 moles The balanced equation for zinc and HCl is Zn + 2HCl = 1H2 + 1 ZnCl2 H=1‚ Zn = 65.38‚ Cl=35.45 Molar Mass of HCl = 101.83 (3.73 X 10-2 moles Zn) (2HCl/1Zn) = 7.46 X 10-2 moles HCl The amount of HCl that should be used is: 50mL of HCl = .05 L of HCl 7.46 X 10-2 moles of HCl X 2 = .1492 moles of HCl used
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