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[DOC File]Experiment 5: EDTA Determination of Calcium and …
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(x M Ca/Mg)(25 mL soln) = (0.01 M EDTA)(40 mL EDTA) x = 0.016 M Ca/Mg . 0.016 mol / L x 40.078 g / mol x 1000 mg / g = 641 mg / L = 641 ppm Note: 40.078 g is the MW of Ca; total calcium is reported in terms of calcium even though both Mg and Ca are present in the sample. In a typical water sample, more calcium salts are present than magnesium ...
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[DOC File]ATPase assay protocol - Indiana University
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1 mL 1000 mg 75,000 g 1 mol 1 L. Use M1V1 = M2V2 to dilute to 3 µM, use final volume of 500 µL. Make dye solution (make day of experiment, make fresh every time): Combine 36 mL of 0.045% malachite green, 12 mL of 4.2% ammonium molybdate, and 1 mL of 1% Triton X-100. Let dye solution sit on bench top at least 1 hour ...
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[DOCX File]AP CHEMISTRY PRACTICE 3.11 - 3.13 - Pearl Public …
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A 2.00 L container will hold about 4.00 g of a gas at 18.0 . o C and 1.08 atm. Calculate the molar mass for this gas. A gas mixture at O o C and 1.15 atm contains 0.010 mol of H 2 , 0.015 mol of O 2 , and 0.025 mol …
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[DOCX File]Hooper's Laboratory - Home
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Calculate the number of grams of Mg(OH) 2 (molar mass 58.32 g/mol) that is dissolved in 100. mL of a saturated solution of Mg(OH) 2 at 25 oC. b. The energy required to separate the ions in the Mg(OH) 2 crystal lattice into individual Mg2+(g) and OH-(g) ions, as represented in the table below, is known as the lattice energy of Mg(OH) 2 (s).
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[DOC File]Act Practice Test Science Items
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A 1.0-mole (mol) piece of Mg ribbon, 0.10 mol of Fe powder, and 0.10 mol of NaCl were added to 25 mL of H2O at 20°C in an insulated container. The mixture was stirred constantly and its temperature was measured every 50 sec. The experiment was repeated with Mg ribbon cut into 100 pieces and with Mg powder (see Figure 1). Experiment 2
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[DOC File]AP Chem
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1. A solution of salt (molar mass 90 g mol-1) in water has a density of 1.29 g/mL. The concentration of the salt is 35% by mass. a. Calculate the molality of the solution. b. Calculate the molarity of the solution. c. Calculate the total number of moles in the solution. d. …
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Chapter 12: Physical Properties of Solutions
Elemental analysis gave an empirical formula of CH3O. A 0.127 g sample of the compound was dissolved in water and diluted to 100.0 mL, and the osmotic pressure of that solution was determined to 0.492 atm at 20°C. Determine the molar mass and molecular formula of the compound. (R = 0.0821 L atm/K mol) Ans: 62.1 g/mol, consistent with C2H6O2
molarity to mg ml

[DOC File]TEACHER’S GUIDE
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Beaker, 250 ml 1 Hydrochloric acid (HCl), 1.00 Molar 200 ml Clamp, Buret (SE-9446) 1 Magnesium oxide (MgO) 1 g Graduated cylinder, 100 ml 1 Magnesium ribbon (Mg) 0.5 g Slit stopper 1 Styrofoam cup 1 Weighing paper 2 Purpose
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[DOC File]Standardizing a Sodium Hydroxide (NaOH) Solution
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Weigh ~0.8 g of dried KHP (MW = 204.23 g/mol) into an Erlenmeyer flask and dissolve in 50-75 mL of distilled water. Record the amount of KHP and water used. Add 4 drops of indicator into the flask and titrate to the first permanent appearance of pink. Near the endpoint, add the NaOH dropwise to determine the total volume most accurately.
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[DOCX File]newburyparkhighschool.net
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What mass of gelatin is needed to make 15 mL of a 12 mg/mL gelatin solution? ... What is the molecular weight (g/mol) of each of the following compounds: NaOH. MgCl2. MgO. CaCl2. What weight (in grams) of H. 2 SO 4. would be needed to make 750 mL of a 2.00 M solution?
mg l to mol l

G mol to mg ml