Calculate the amount needed to prepare a solution of PVA 5% w / w (Molar mass: 86.09 g / mol) in 15 ml of a solution (10% water and 90% ethanol).
Calculate the amount needed to prepare a solution of PVA 5% w / w (Molar mass:...
calculate the mass,W of the CuSO4 · 5H2Osample needed to prepare 100 ml of: Table 1. PREPARATION OF THE SOLUTIONS BY THE DISSOLUTION TECHNIQUE Calculate mass, W of the CuSO4.5H20(s) sample, needed to prepare 100 ml of: Molar mass of CuSO4.5H20 M, gram Volume of the prepared CuSO4 solution, V, liter 0.100M CuSO4 solution 0.300M CuSO4 solution 0.500M CuSO4 solution W gram W, gram W, gram 250. g/mol 0.100
Calculate the molal (not molar) concentration: c) A 1% (w/w) solution of cocaine hydrochloride (molar mass 339.81 g/mol) in water.
How to prepare in a beaker 100 ml, 50 ml of a solution of PVA 5% w / w with ethanol.
19. a. What mass of potassium bromide is needed to prepare a 250. mL of a 2.00 M KBr aqueous solution? Molar mass of KBr = 119.00 g/mol. Use dimensional analysis to calculate the mass. b. Describe the full process of how you would prepare this solution in a 250. mL volumetric flask. c. Calculate the concentration of the solution in question a. if more water was added to bring the solution to a final volume of 1000. mL. (Hint:...
A 12.5% (w/w) NiCl2 (129.61 g/mol) solution has a density of 1.149 g/mL. Calculate(a) the molar concentration of NiCl2 in this solution.(b) the molar Cl− concentration of the solution.(c) the mass in grams of NiCl2 contained in each liter of this solution.
2. Calculate the mass of KHP needed to react completely with 15 mL of a 0.10 M NaOH solution. Consider the reaction equation to be as shown below, molar mass of KHP is 204.3g/mol 3. Calculate the molarity of a solution of sodium hydroxide if 23.64 mL of this solution is needed to neutralize 0.5632 g of KHP. 4. It is found that 24.68 mL of 0.1165 M NaOH is needed to titrate 0.2931 g of unknown monoprotic acid to...
Calculate how many grams of Na2EDTA dihydrate (, molar mass = 372.24 g/mol) will be needed to prepare 500.0 mL of an EDTA solution that is approximately 0.010 M. (Enter just the numeric value with the proper SFs) Answer in grams
You need to prepare a 2.10 M solution of sodium hydroxide (molar mass of sodium hydroxide= 40.00 g/mol), but you only have 10 mL graduated cylinder and a 25 mL beaker. Complete the following sentences regarding the concentration of the prepared solution. 1. In order to prepare 10.0 mL (0.0100 L) solution of 2.10 M sodium hydroxide, a mass of ?? would be required. 2. When the solute and a total of 10.0 mL of water are both added into...
calculate the amount of NaCL and water needed to prepare 50.0 mL of a 1.85% (by mass) NaCl solution. Assume that the added salt does not change the volume of the water.
Calculate the vapor pressure of a solution made by dissolving 94.5 g of urea (molar mass= 60.06 g/mol) in 214.5 mL of water at 35°C (Hint: The vapor pressure of pure water at 35°C is given in the table below. Assume the density of the solution is 1.00 g/mL.) What is the magnitude of vapor-pressure lowering? mmHg