9.47 Calculate the grams of solute needed to prepare each of the following: a. 2.00 L of a 1.50 M NaOH solution b. 4.00 L of a 0.200 M KCl solution c. 25.0 mL of a 6.00 M HCl solution 9.48 Calculate the grams of solute needed to prepare each of the following: a. 2.00 L of a 6.00 M NaOH solution b. 5.00 L of a 0.100 M CaCl2 solution c. 175 mL of a 3.00 M NaNO3 solution 9.49 For each of the following solutions, calculate the: a. liters of a 2.00 M KBr solution to obtain 3.00 moles of KBr b. liters of a 1.50 M NaCl solution to obtain 15.0 moles of NaCl c. milliliters of a 0.800 M Ca(NO3)2 solution to obtain 0.0500 mole of Ca(NO3)2 9.50 For each of the following solutions, calculate the: a. liters of a 4.00 M KCl solution to obtain 0.100 mole of KCl b. liters of a 6.00 M HCl solution to obtain 5.00 moles of HCl c. milliliters of a 2.50 M K2SO4 solution to obtain 1.20 moles of K2SO4 REVIEW Solving Equations (1.4) 9.5 Dilution of Solutions LEARNING GOAL Describe the dilution of a solution; calculate the new concentration or volume when a solution is diluted. In chemistry and biology, we often prepare a dilute solution from a more concentrated solution. In a process called dilution, a solvent, usually water, is added to a solution, which increases the volume. As a result, the concentration of the solution decreases. In your everyday life, you are making a dilution when you add three cans of water to a can of concentrated orange juice.
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47: #### Part a: Calculate the grams of solute needed to prepare \(2.00 \, \mathrm{L}\) of a \(1.50 \, \mathrm{M} \, \mathrm{NaOH}\) solution. ** Show more…
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12.39 Calculate the molarity of each of the following: a. 2.00 mol of glucose in 4.00 L of a glucose solution b. 4.00 g of KOH in 2.00 L of a KOH solution c. 5.85 g of NaCl in 400. mL of a NaCl solution 12.40 Calculate the molarity of each of the following: a. 0.500 mol of glucose in 0.200 L of a glucose solution b. 73.0 g of HCl in 2.00 L of a HCl solution c. 30.0 g of NaOH in 350. mL of a NaOH solution 12.41 Calculate the grams of solute needed to prepare each of the following: a. 2.00 L of a 1.50 M NaOH solution b. 4.00 L of a 0.200 M KCl solution c. 25.0 mL of a 6.00 M HCl solution 12.42 Calculate the grams of solute needed to prepare each of the following: a. 2.00 L of a 6.00 M NaOH solution b. 5.00 L of a 0.100 M CaCl2 solution c. 175 mL of a 3.00 M NaNO3 solution 12.43 For each of the following solutions, calculate the: a. liters of a 2.00 M KBr solution to obtain 3.00 mol of KBr b. liters of a 1.50 M NaCl solution to obtain 15.0 mol of NaCl c. milliliters of a 0.800 M Ca(NO3)2 solution to obtain 0.0500 mol of Ca(NO3)2 12.44 For each of the following solutions, calculate the: a. liters of a 4.00 M KCl solution to obtain 0.100 mol of KCl b. liters of a 6.00 M HCl solution to obtain 5.00 mol of HCl c. milliliters of a 2.50 M K2SO4 solution to obtain 1.20 mol of K2SO4 12.45 Calculate the volume, in milliliters, for each of the following that provides the given amount of solute: a. 12.5 g of Na2CO3 from a 0.120 M Na2CO3 solution b. 0.850 mol of NaNO3 from a 0.500 M NaNO3 solution c. 30.0 g of LiOH from a 2.70 M LiOH solution
Adi S.
12. Molarity, M, is defined as A. moles of solute dissolved in 1 mol of solvent. B. moles of solute dissolved in 1 kg of solvent. C. moles of solute dissolved in 1 L of solvent. D. moles of solute dissolved in 1 L of solution. E. moles of solute dissolved in the solution. 13. What volume of 2.50 M NaOH (40.00 g/mol) contains 0.100 mole of NaOH? A. 0.250 L D. 0.250 mL B. 40.0 mL E. 0.0400 mL C. 25.0 mL 14. How many grams of sodium chloride (NaCl, 58.44 g/mol) are needed to make up 250 mL of a solution that is 2.00 M ? A. 4.28 g D. 29.2 g B. 7.30 g E. 117 g C. 14.6 g 15. How many grams of solid potassium chlorate (KClO3, 122.55 g/mol) are needed to make 150 mL of 0.50 M solution? A. 0.11 g D. 0.41 g B. 37 g E. 2.7 x 10^-2 g C. 9.2 g 16. In the dilution of 10.0 mL of a 0.10 M solution of HCl to a volume of 20.0 mL, what remains unchanged? A. the mass of the HCl solution D. the moles of HCl in the solution B. the concentration of the HCl solution E. All of the above change. C. the volume of the HCl solution 17. What volume of 12.0 M HCl solution needs to be diluted to produce 500.0 mL of 3.00 M HCl solution? A. 0.125 L D. 2.00 L B. 0.250 L E. 1.00 L C. 0.500 L
Madhur L.
1.0) Classify each as being either a solution or an emulsion (colloid): a. Maple syrup b. IV saline drip c. Whole milk d. Eye drops e. Moisturizing hand cream 2.0) The solubility of ascorbic acid (vitamin C) is 33.0 grams/100g of H2O at 0°C. Suppose, at that temperature you take 27.0 grams of ascorbic acid and stir it into 100g of water. Will you have an unsaturated, saturated, or supersaturated solution? 3.0) Calculate the molarity of the following solutions (WATCH your units- Molarity is moles/liter so volumes must be in liters!): a. 3.00 L of solution that contains 0.750 mol of solute. b. 250 ml of solution that contains 0.630 mol of solute. c. 0.160 mol of solute put into a flask and enough distilled water is added to give 500 ml of solution. 4.0) Calculate the molarity of the following solutions: a. A sample of NaCl weighing 0.190 grams dissolved in enough water to make 10.0 ml of solution. b. A 7.60 gram sample of glucose (C6H12O6) dissolved in enough water to make a 200 ml solution. c. 25 ml of solution that contains 1.75 grams of potassium sulfate (K2SO4) d. 4.50 grams of sodium hydroxide (NaOH) dissolved in 300 ml of water.
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