zinc with HCl. Zn (s) + 2 HCl(aq) ====> Zn+2(aq) + 2 Cl-(aq) + H2(g) Reaction: Zn(s) + 2 H+(aq) ====> Zn+2(aq) + H2(g) 6. How many moles of HCl are needed to react completely with all of the zinc in a post 1982 penny? 7.46 x 10-2 mol HCl 7. In a procedure developed to determine the percent zinc in post 1982 pennies‚ 50 ml of an HCl solution was used to react (dissolve) all of the zinc in the penny. To ensure complete reaction‚ the solution contains twice as many moles of HCl that is
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A burette and funnel were rinsed off using water and cleaned well. The burette and funnel were rinsed a second time using 5mL of the HCl solution that was prepared the previous week and disposed of in a clean beaker. The rest of the HCl solution was then put in the burette. The beaker containing the baking soda solution was placed under the burette. 1mL of the HCl solution was released at a time into the beaker with the baking soda until a change was observed. The results were recorded. The process
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properties of five common acids used in industry. Give some examples of the typical uses of each. 4. Although HCl(aq) exhibits properties of an Arrhenius acid‚ pure HCl gas and HCl dissolved in a nonpolar solvent exhibit none of the properties of an Arrhenius acid. Explain why. - HCl(g) consists of covalently bonded molecules that don’t ionize. Nonpolar solvent molecules don’t attract HCl molecules to cause them to be ionized. 5. a. What distinguishes strong acids from weak acids? - Strong acids
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NaOH solution. 2. Record volume. 3. Measure out between 20 milliliters and 40 milliliters of the unknown HCl solution. 4. Record volume. 5. The amount of unknown HCl is then added to the 100-milliliter Erlenmeyer flask. 6. Add two drops of the indicator‚ phenolphthalein‚ to the acid in the flask. 7. Using the slider on the right hand side‚ add NaOH to the HCl in the Erlenmeyer flask (This action is known as titrate). Add the indicator until the color of the indicator turns
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Abstract Titration is a laboratory method in which the endpoint of a reaction is determined quantitatively. In this experiment‚ the amount of soda ash present in a sample was determined and the alkalinity reported as it was titrated using HCl as the titrant. Also‚ the percentage amount of Na2CO3 and NaHCO3 present in the sample was determined at the end of the experiment. Introduction Soda Ash (Na2CO3) or sodium carbonate is commonly used as a cleaning agent and known as “washing
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CASE STUDY 1: Xstrata Produced Acidic Oxide – SULFUR DIOXIDE Industrial Process – Sulfur Dioxide is an acidic oxide produced domestically and industrially in many ways. Xstrata‚ particularly Mount Isa Mines LTD‚ produces sulfur dioxide as a by-product from the extraction of copper from ores. Copper ore mined in Australia is predominantly chalcopyrite (CuFeS2)‚ a sulfide ore of copper. The extraction of copper begins with crushing the ore and subjecting the crushed ore to froth floatation. In
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| Name of the chemical compound | Formula | 1 | Acetic acid formula | CH3COOH | 2 | Hydrochloric acid formula | HCl | 3 | Sulfuric acid formula | H2SO4 | 4 | Acetate formula | CH3COO- | 5 | Ammonia formula | NH3 | 6 | Nitric acid formula | HNO3 | 7 | Phosphoric acid formula | H3PO4 | 8 | Sodium phosphate formula | Na3PO4 | 9 | Calcium carbonate formula | CaCO3 | 10 | Ammonium sulfate formula | (NH4)2SO4 | 11 | Carbonic acid formula | H2CO3 | 12 | Sodium bicarbonate formula
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Reshmi Nair Title: Determination of Aspirin through back titration. Aim: To determine the concentration of Aspirin in a tablet using NaOH and Hcl. Research Question: What is the concentration of Aspirin in a normal tablet? Background: Aspirin is the general name for acetylsalicylic acid (ASA); it is also the trademark of the drug produced by Bayer in Germany. In eighty countries‚ aspirin is a registered trademark‚ but in other places the term aspirin refers to ASA by itself or as an ingredient
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provided pre-diluted chemicals. Utilizing the 96-well plate‚ 2 pipit drops of each chemical were added to the wells in the following combinations: a) NaHCO3+HCl b) HCl+Bromthymol blue c) NH3+1 drop Bromthymol blue d) HCl+blue dye e) Blue dye+NaOCl followed by HCl f) NaOCl+KI followed by various test foods g) KI+Pb(NO3)2 h) NaOH+phenolphthalein i) HCl + phenolphthalein j) NaOH+AgNO3 k) AgNO3+NH3 l) NH3+CuSO4. Along the way‚ observations were made pertaining to the reactions witnessed. This experiment concluded
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secondary alcohols will react with HCL and KmnO4‚ and the tertiary alcohol wont react with either HCL nor KMnO4 due to the location of the OH. The carbon that is bonded to the OH in both primary and secondary still has one or two Hydrogen atoms to undergo reactions‚ but the carbon in the tertiary alcohol do not have any Hydrogen to undergo reactions with. Materials: refer to the handout. Procedure: refer to the handout. Observation: Alcohol | Reaction with HCL | Reaction with KMnO4
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