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b. Addition of the weak base NaF to HF raises the pH while the much weaker base NaCl does not significantly raise the pH when added to HCl. Therefore the HF/NaF solution has the highest pH. NH4+ is the weak conjugate acid of the weak base NH3. Addition of NH4Cl to basic NH3 therefore lowers the pH. So the NH3 solution has the highest pH.
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[DOC File]PRACTICE PROBLEMS - CHEMISTRY
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Calculate [NH3], [NH4+] and [OH-] in a solution originally 0.200 M NH3. NH3 (aq) + H2O ( NH4+ (aq) + OH- (aq . Initial 0.200 M 0 0. Change -x +x +x. After 0.2 – x x x Plug into equilibrium expression and solve for x. 1.8 x 10-5 = [x]2 so x = .0018 [0.2 – x] ... Equilibrium Practice Problems ...
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[DOC File]Concentration Worksheet
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6. An 800 g solution of Kool-Aid contains 780 g of water. What is the mass percent of solute in this solution? (800 – 780)/800 * 100% = 2.5%. 7. What is the mass percent of a solution created by adding 10 g of olive oil to 90 g of vegetable oil? 10/(10+90)* 100% = 10% 8. If a 4000g solution of salt water contains 40g of salt, what is its mass ...
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[DOC File]AP Chemistry study guide for Solutions (Chapter 11)
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The outside solution is . Hypotonic / Hypertonic / Isotonic . to the cell. Water will move . Into / Out of. the cell and cause the cell to . Decrease / Increase / Stay Constant . in size. 7. You have a cell, with a semi permeable membrane and a 1.5% potassium concentration. ... Practice Problems for …
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[DOC File]Practice Problems for Diffusion and Osmosis:
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Standard concentration for a substance in solution is 1 M and standard pressure for a gas is 1 atm. The concentrations of pure solids or pure liquids do not appear explicitly in the equilibrium constant expression. ... Equilibrium Practice Problems: using equilibrium constants and ICE tables ...
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[DOC File]Equilibrium Practice Problems: using equilibrium constants ...
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5) What is the molarity of a solution in which 0.45 grams of sodium nitrate are dissolved in 265 mL of solution. 0.020 M. 6) What is the mole fraction of sulfuric acid in a solution made by adding 3.4 grams of sulfuric acid to 3,500 mL of water? 1.8 x 10-4 7) What will the volume of a 0.50 M solution be if it contains 25 grams of calcium hydroxide?
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[DOC File]Solubility Curve Practice Problems Worksheet 1
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AP Chemistry study guide for Solutions (Chapter 12) & Solution Stoich (Chapter 4b) Students should be able to... Define: solute, solvent, solution, ... Sample AP problems. 15. The weight of H2SO4 (molecular weight 98.1) in 50.0 milliliters of a 6.00-molar solution is
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[DOC File]Equilibrium Practice Problems
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Solubility Curve Practice Problems Worksheet 1. Here's an example of how to read the graph. Find the curve for KClO3. At 30°C approximately 10g of KClO3 will dissolve in 100g of water. If the temperature is increased to 80°C, approximately _____ of the substance will dissolve in 100g (or 100mL) of water.
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[DOC File]SOLUTIONS TO PRACTICE PROBLEMS
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Determine the molarity of a solution prepared by dissolving 141.6 g of citric acid C3H5O(COOH)3 in water to make a final solution with a volume of 3500.0 mL. 26. What is the new freezing point of a solution in which 65.1 grams of MgCl2 is added to 400. g of water? ... Practice Problems for Honors Chemistry Final Exam ...
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[DOC File]Practice Problems for Honors Chemistry Final Exam
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15. A solution is prepared by dissolving 29.0 g CsCl in 21.0 g H2O, giving a 6.00 M solution. Calculate the density of the solution. (1.75g/ml) 16. A solution is prepared by mixing 35.0 mL 2.50 M HCl and 50.0 mL 0.150 M HCl. Assuming the volumes are additive, calculate the molarity of the resulting solution. ... PRACTICE PROBLEMS - CHEMISTRY ...
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Solution chemistry practice problems