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A solution is made by disolving 2.54 mg of sodium benzoate in 75.00 kg H20 a)...
6. You made a solution of sodium benzoate by dissolving 1.9gm of sodium benzoate in 20ml of distilled water. Calculate its molarity (MW of sodium Benzoate 144gm)
You made a solution of sodium benzoate by dissolving 1.9 grams of sodium benzoate in 20 mL of distilled water. Calculate its molarity. (MW of sodium benzoate is 144 g)
1. The LD50 of cocaine is 95.1 mg/kg. Calculate the concentration of a solution, in molarity if they drank 1 liter of it. 100 g / 303.346 g/mol = 0.329 mol of cocaine. 0.329 mol/ 1 L= 0.329 M for molarity. Is this correct? 2. Find one other concentration unit [mass/mass (g/g) or mass/volume (g/ml) percentage, ppm or ppb] that would be toxic to a 85 kg person. Assume the density of a solution of your substance is the same...
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6. You made a solution of sodium benzoate by dissolving 1.9gm of sodium benzoate in 20ml of distilled water. Calculate its molarity (MW of sodium Benzoate 144gm) 7. You added 2ml of 3M HCL to the above benzoate solution and tested the pH which was 3.1. Given that the PKA of benzoic acid is 4.1, what are the ratios of sodium benzoate of benzoic acid in your reaction? 8. In the above experiment, what is the...
PPM and PPB A 180-mg sample of Na2CO3 is dissolved in H2O to give 2.80L of solution. What is the concentration of Na+ in parts per million (ppm)? Note: "ppm" are 106 ×[(mass of solute)/(mass of solution)] ppm 1pts Tries 0/5 A 2.15-mg sample of dioctyl phthalate (C24H38O4), a plasticizer, is dissolved in H2O to give 550mL of solution. What is the concentration of dioctyl phthalate in parts per billion (ppb)? Assume U.S. definition of "one billion" = 109 (as...
A solution at 25°C has a concentration of the permanganate ion, MnO4- (aq) = 2.38 mg/L. The solution has a density = 1 kg/L. What is the concentration of MnO4- (aq) in units of µg/L? What is the concentration of MnO4- (aq) in units of g/L? What is the concentration of MnO4- (aq) in units of moles/L? What is the concentration of MnO4- (aq) in units of millimoles/L? What is the concentration of MnO4- (aq) in units of micromoles/L? What...
Question 3 If you dilute 25.00 mL of 0.90 M sodium phosphide solution to make 75.00 mL of a new solution what is the new solutions concentration expressed as M of sodium ions? 2.7 M 0.90 M 0.45 M 0.30 M
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3) A solution contains 3.75 x 102 mg/mL of A (MW=220 g.mol1). This corresponds to a concentration (wt/vol) of: d) 1.70 x 103 ppm c) 37.5ppm b) 1.70 ppb a) 0.0375 ppb
What is the pH of a 0.0100 M solution of sodium benzoate, NaC7H302? (K for benzoic acid, HC7H502 - 6.3 x 10-5). CyH5O2 (aq) + H20(1) = HC7H5O2(aq) + OH(aq) O pH = 9.82 O pH - 0.38 O pH = 5.91 O pH = 8.10 O pH = 13.62
A solution contains 4.7 mg of Cu2+ per 1.00 kg solution. Calculate the concentration in ppm. Enter your answer in the provided box.