Preparing Dilutions 0.6355 grams of primary standard sodium chloride (MM = 58.4428 g/mol, 39.3372% Na+, 60.6628%...
A technician tares a 100.0 mL volumetric flask at 150.00 g. After adding sodium chloride to the flask it then weighs 158.84 g. Assuming an error of 0.2 mL in the volumetric volume and 0.005 g in the weight, calculate the molar concentration of sodium chloride and its associated standard deviation.
2. A technician tares a 100.0 mL volumetric flask at 150.00 g After adding sodium chloride to the flask it then weighs 158.84 g. Assuming an error of 0.2 mL in the volumetric volume and 0.005 g in the weight, calculate the molar concentration of sodium chloride and its associated standard deviation.
A chemist prepares a solution of sodium carbonate (Na,co) by measuring out 31. g of sodium carbonate into a 100 ml. volumetric flask and filling the flask to the mark with water. Calculate the concentration in mol/L of the chemist's sodium carbonate solution. Round your answer to 2 significant digits. moll. x 5 ?
How many grams of the primary standard sodium carbonate, Na2CO3 (molar mass=105.99g/mol) is needed to react with 19.4 ml of 0.15 M HCL?
A Na_2CO_3 standard solution is prepared by transferring 2.4817 g of primary standard grade sodium carbonate into a 250.0 mL volumetric flask, dissolving the sample in ~ 100 mL of distilled deionized water, and diluting to the mark. A 25.00 mL aliquot is taken and titrated with 42.65 mL of HCI solution. Calculate the concentration of the HCI solution. (Molar masses are: Na_2CO_3 = 105.989 g/mole; HCI = 36.461 g/mole; H_2O = 18.015 g/mole.) Circle the best choice. (Showing calculations...
A 7% solution of sodium chloride (Na Cl - MW = 58.44 g/mol) has been prepared by a technician for direct intravenous injection to a patient. While reviewing the order and preparation, you recall that this concentration seems to be abnormal. As a result, you want to determine the osmolarity of the solution. What is the osmolarity of this solution? Note: Please provide your answer in units of mOsmol/L.
Sodium carbonate (MM=105.988 g/mol) is a primary standard base that reacts with hydrochloric acid as follows: Na2CO3 + 2HCI → 2NaCl + H2O + CO2(g) If 39.09 mL of an HCl solution were required to titrate a solution containing 287.5 mg of primary standard Na2CO3, calculate the molarity of the HCl solution.
A student weighs out 14.6 g of AlBrz, transfers it to a 300 mL volumetric flask, adds enough water to dissolve the solid and then adds water to the 300 mL mark on the neck of the flask. Calculate the concentration (in molarity units) of aluminum bromide in the resulting solution? Calculate the mass, in grams of sodium iodide that must be added to a 250 mL volumetric flask in order to prepare 250 mL of a 0.138 M aqueous...
How many grams of Na2SO4 (142.04 g/mol) are needed to prepare 125.0 mL of 2.50 mM solution of Na+? What's the concentration in ppm of Na+ in this solution?
One way the U.S. Environmental Protection Agency (EPA) tests tor chloride contaminants in water is by titrating a sample of silver nitrate solution Any chloride anions in solution will combine with the silver cations to produce bright white silver chloride precipitate Suppose an EPA chemist tests a 250. mL sample of groundwater known to be contaminated with iron (II) chloride, which would react with silver nitrate solution like this: The chemist adds 88.0 mM silver nitrate solution to the sample...