1. What is the molality of a solution prepared with 101. g KNO3 and 300. g water?
2. How many grams of solvent are needed to prepare a 0.275 m KCl solution that contains 9.625 × 10-3 mol KCl?
1. What is the molality of a solution prepared with 101. g KNO3 and 300. g...
What is the molality of a solution prepared by dissolving 300 g KCl in 225 g H2O? Show all calculations and report your answer to the correct number of sig figs.
All the following solutions are prepared using either KNO3 (a solid, MW=101.10 g/mol, density = 2.11 g/ml) or Ethanol (a liquid, density = 0.79 g/ml). PERCENTAGES: Prepare 150 ml OF 67% KNO3, w/v = ___________g/150 ml water CALCULATIONS: Prepare 900 ml of 30% KNO3, v/v = ___________mL/900 mL total CALCULATIONS: _________ g of KNO3 + __________ ml of water = 900 ml total Prepare 300 ml of 45% ethanol solution, w/v = _____________ g/300 mL total CALCULATIONS: ___________ ml of...
1. Determine the molality of a solution prepared by dissolving 4.95 g of potassium chloride in 70 g of water. Enter your answer to 2 decimal places 2. Determine the molality of a solution of benzene dissolved in toluene (methylbenzene) for which the mole fraction of benzene is 0.132. Give your answer to 2 decimal places. 3. How many moles of solute particles are present in 7.89 mL of 0.458 M K2SO4? When you have your answer, take the LOG...
1. A 19.6 gram sample of KCl is used to make a 275. mL KCl solution. What is the molarity of the KCl solution? 2. A chemist has a bottle containing 0.25 M CuCl2. How many milliliters of this solution should the chemist use to add 12.0 grams of CuCl2 to her reaction? 3. In a saturated solution of the ionic compound sodium sulfate, Na3PO4 all of the water molecules are involved in the hydration process. some solid Na3PO4 is...
please answer 1-5 and show and explain steps clearly, thank you :) 1. How many milliliters of 13.2 MH.SO, are needed to prepare 600.0 mL of 0.10 M H SOC? (4.5 mL) 2. 1.60 L of an aqueous solution containing 25.00 g of KCl dissolved in pure water is prepared. What is the molarity of the resulting solution? (0.210 M) 3. A solution containing 292 g of Mg(NO3)2 per liter has a density of 1.108 g/mL. What is the molality...
Question 17 A solution is prepared by dissolving 45 g sodium carbonate, Na2CO3, in enough water to make 200 mL of solution. If the density of the solution is 1.1094 g/mL, what is the % mass of the solution? Question 18 Calculate the molarity of a 4.628 m solution of Sr(NO3)2 in H2O. The density of this solution is 1 g/mL Include units. Question 19 What is the molarity of a sodium chloride solution prepared by diluting 2.1 mL of...
Solutions and Dilutions 1. What would be the percent (%) concentration of a solution that results from the combination of 115.0 grams of potassium nitrate with 0.320 L of water? Identify the solute and solvent of the solution 2. A solution is prepared by mixing together 76.40 mL of liquid ethanol (C2H4O) and 110.25 mL of water. Identify the solute and solvent of the resulting solution. What would be the percent (%) concentration of the solution? 3. How many grams...
SOLUTIONS (Molarity, Molality) SECTION 9) What is the molarity [MJof a solution that is made by dissolving 2.00 moles of solute in 300. mL of solution? 10) What is the molarity of the solution when 0.400 moles of copper sulfate dissolves in 0.200 liters of solution? 11) What is the molarity of solution when 16.88g of sodium chloride is dissolved in water to a total volume of 1000.00 ml? What is the mass percent of 10.0 grams Mg (NO3)2 dissolved...
5. Molality, m =- The molality of NaBr solution is 1.25 m 1.25 mole of NaBr I 1.0 kg of the solvent Question 17. Calculate the number of g solvent that contains 12 g NaBr of 1.25 m solution of NaBr. [8.14E2 g solvent] Question 18. Calculate the molality of a solution containing 17.2 g of ethylene glycol (CzH02 ) dissolved in 0.500 kg water. [5.54E-1 m) Question 19. What is the formula of sucrose? Calculate the molality of a...
1.) What is the molarity of a potassium hydroxide solution prepared by dissolving 2.74 g KOH in 4.2 mL of water? 2.) How many grams of sodium hydroxide are delivered by 6.8 mL of a 10 % solution in water? 3.) Hydrogen chloride (a gas) is dissolved into water to create hydrochloric acid, and therefore is a solution. Commercially available concentrated hydrochloric acid is sold as a 35 - 37 % solution. What molarity does this equate to? 4.) How...