Discussion The data supported the hypothesis that if Daphnia are placed in differently concentrated solutions of barium and calcium chloride‚ then the highest concentration of calcium chloride would affect them the most because of the production of hydrochloric acid and calcium oxide from the mixing of water and calcium chloride‚ two very dangerous acids‚ with the highest concentration having the biggest chemical reaction. Within five minutes of putting the Daphnia into the 10 (ppt) solution of
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The Diels-Alder Reaction Submitted by: Joe Student Partner: Jill Student Date: February 8‚ 2005 TA: Super TA Reaction +OOOxylene140 oCOOO Data Table Reagents MW Grams used Lit. Mp Anthracene 178.23 g/mol 1.023 g 216-218ºC Maleic anhydride 98.06 g/mol 0.497 g 54-56ºC Products MW Grams obtained Lit. Mp Observed Mp Crude product 276.29 g/mol 1.362 g 261-262ºC 260.2-261.3ºC Recryst. Product 276.29 g/mol 1.283 g 261-262ºC 261.3-261.9ºC Results and Discussion Discuss the
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Hugh Kim Lab Report: Stoichiometry Lab 1. Prelab Part1. 1) Create no waste = The principle that encourages chemists to not create waste at the first place rather than cleaning it up afterwards effectively shifts the chemistry more environmentally conscious‚ as creating no waste would make the experiment efficient; the reactants will be reduced to only the essential ones and the product will be maximized‚ a change that would make the experiment economic. Also‚ if chemists aim to
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98.) Consider the unbalanced redox reaction: Cr2O72- (aq ) + Cu(s ) → Cr3+ (aq ) + Cu2+ Balance the equation in acidic solution and determine how much of a 0.850 M K2Cr2O7 solution is required to completely dissolve 5.25 g of Cu. Nitric acid is usually purchased in concentrated form with a 70.3% HNO3 concentration by mass and a density of 1.41 g/mL. How much of the concentrated stock solution in milliliters should you use to make 2.5 L of 0.500 M HNO3? Mass %= Mass Solute/ Mass Solvent + Mass
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Investigate the effect of concentration on the rate of a reaction Research question: To what extent does the concentration of hydrochloric acid affect the rate of the following reaction: 2 HCl(aq) + CaCO3(s) → CaCl2(aq) + H2O(l) + CO2(g) Data Collection and Processing: Table1: Different volumes of Co2 gas produced by Different concentrations of HCL acid. Volume of CO2gas formed from 5 different concentrations of HCL acid ±0.5ml 5 different concentrations of HCL acid (Mol) ±0.5ml Time (sec) ±0
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Reactants Predictions Before Combining Observations After Combinin g Starch + I2 No reaction‚ starch will remain white Reaction; black deposits on the glass tube. Starch turns black Food coloring + NaOCl No reaction; will turn lighter Reaction; the solution that was dark blue turned into light blue Food coloring + CH3COOH No reaction; color will turn lighter No reaction; when both combined‚ the color (dark blue) remained the same Food coloring + NaOCl + CH3COOH No reaction; solution will remain
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for the reaction of aluminum sulfate and sodium hydroxide contains which of the following species? a) 3Al3+(aq) b) OH–(aq) c) 3OH–(aq) d) 2Al3+(aq) e) 2Al(OH)3(s) ANS: c) 3OH–(aq) PAGE: 4.6‚8 6. Which of the following is a strong acid? a) HF b) KOH c) HClO4 d) HClO e) HBrO ANS: c) HClO4 PAGE: 4.2 7. Which of the following is not a strong base? a) Ca(OH)2 b) KOH c) NH3 d) LiOH e) Sr(OH)2 Ans: c) NH3 Page: 4.2 8. When sodium chloride and lead(II) nitrate
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Clostridium Difficile Anna Kay Mew BIOL 210 Summer 2013 Frank D Boone June 11‚ 2013 Clostridium Difficile The healthcare professional can expect to encounter various conditions within their scope of experience. Clostridium difficile represents one of the most common and challenging nosocomial infections that can cause life-threatening complications such as hypervolemia‚ sepsis‚ pain‚ and peritonitis (Grossman and Mager 155). The recognition‚ diagnosis‚ treatment and inhibition
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student is to accurately determine the concentration of a solution of sodium hydrogencarbonate in a titration against a standard solution of hydrochloric acid‚ HC1. The first step in this experiment is to accurately dilute 100.0 mL of a 1.00 M HCl stock solution to a 0.100 M solution using a 1.00 L volumetric flask. However‚ instead of using distilled water in the dilution‚ the student mistakenly adds 900.0 mL of 0.0222 M sodium hydroxide‚ NaOH‚ solution. a. Write an equation for the reaction that
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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 | NaHCO3 | 13 | Sodium hydroxide formula | NaOH | 14 | Calcium hydroxide formula | Ca(OH)2 | 15 | Ethanol formula | C2H5OH | 16 | Hydrobromic acid formula |
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