Question 4: An alcohol solution is prepared by mixing 50.0mL (31.5g) of ethyl alcohol (CH3CH2OH) with...
1. An alcoholic solution is prepared by mixing 50.0 mL (31.5 g) of ethyl alcohol (CH3CH2OH) with 75.0 mL (75 g) of water. a. Identify the solute and solvent. b. What is the mass of the solution in grams? c. What is the volume of the solution (in mL)? d. Calculate the mass/volume% of the solution. e. Calculate the molarity of the solution. f. If you diluted 25 mL of this solution to a volume of 100 mL, what would...
A solution is prepared by mixing 1.15 g of ethanol (CH3CH2OH) with 100. g of water. Calculate: (a) the percent by mass, (b) mole fraction, (c) molality, and (d) molarity of this solution. Assume that the density of the solution is 1.00 g/mL
i cant seem to get #4/5 7.2 g Pb 7.2 mg Pb 106 g sln L sln oblems 3-6: 3) A solution should be prepared as 3.56 M calcium chloride, CaCl2. Calculate mass (b) of the VOI solute that is needed in order to prepare 3500 mL of the solution. 3.56M CaCl2 mois. -= 12.46mols 3.5L - mol 12.46 molsy 110. agu Imol = 1382.86 11400g (4) A solution is prepared by dissolving 65 g of ethyl alcohol (density=0.78 g/mL)...
A buffer solution is prepared by mixing 1000mL of 2 0M lacthtc acid with 100.0mL of 20M sodium lactate. This butferis then diluted 1-5 by adding 4ooml of the buffer to 160.0mL of delonized water. the buffer to 160.0mb of deionized water Calculate the volume (in mL) of 2.oM HCI required to change pH of 50.0ml. of this diluted buffer by one pH unit. Ka (lactic acid) 1.38x104
2(10 points) A solution is prepared by dissolving 25.00 grams o f ba rium nitrate, Ba(NO) in sufficient water to make 500.0 mL of solution. A 25.0 mL sample of this is diluted with water to a final volume of 200.0 mL. What is the molarity of the final solution? (Ba(NO>-398.6 g/mol) 3. (10 points) Consider a solution prepared by mixing 349 grams of methanol, CHOH CHOH-320 g/mol) and 750 grams water. The final volume of the solution is 1105...
ethyl alcohol stock solution: 6.0% (w/v) Needed final concentration: 0.30% (w/v) Needed final volume: 50.0 mL 1. Calculate the number of grams of ethyl alcohol in 2.5 mL of stock solution. 2. Calculate the number of grams of ethyl alcohol in 50.0 mL of prepared final solution.
Consider that you prepared a solution by mixing 0.15 g solute with 7.59 g of solvent. If you measured that the solution had a molality of 0.164 m, what is the molar mass of the solute? Express your answer numerically to three significant figures.
Consider that you prepared a solution by mixing 0.21 g solute with 9.52 g of solvent. If you measured that the solution had a molality of 0.154 m, what is the molar mass of the solute? Express your answer numerically to three significant figures.
Consider that you prepared a solution by mixing 0.19 g solute with 8.72 g of solvent. If you measured that the solution had a molality of 0.178 m, what is the molar mass of the solute? Express your answer numerically to three significant figures.
Chemistry 2A Lab 13: Solution Calculations Introduction This lab involves sample calculations using various concentration units. This lab will work with the following types of concentration units: % mass, % volume, % mass/volume, and molarity. A solution is the sum total of the solute and solvent. % mass= mass solute mass solution -100 volumesolute .100 % volume- volume solution % mass/volume mass solute volumesolution -100 Molarity moles solute liters solution The dilution of a liquid requires the addition of more...