1. A blood serum sample is analyzed and found to contain 102.5 µg Ca²*/mL serum. The density of the serum is 1053 kg/m²; AW Ca = 40.08. What is the Ca?* concentration, in terms of (a) molarity ? (b) meq Ca²* /L serum? (c) ppm Ca*2 by wt? 2. How many mL of a 0.250 M KCI solution must be diluted to 1.000 L so that the diluted solution (density = 1.00 g/mL ) is 400 ppm K* by weight ? (MW KA = 74.55; AW K = 39.10) 3. How many mL of 0.125 M C* must be reacted with 12.00 ml of 0.200 M MnO, if the redox products are Cn0? and Mn2* ?

1. A blood serum sample is analyzed and found to contain 102.5 µg Ca²/mL serum. The density of the serum is 1053 kg/m²; AW Ca = 40.08. What is the Ca? concentration, in terms of (a) molarity ? (b) meq Ca²* /L serum? (c) ppm Ca2 by wt? 2. How many mL of a 0.250 M KCI solution must be diluted to 1.000 L so that the diluted solution (density = 1.00 g/mL ) is 400 ppm K by weight ? (MW KA = 74.55; AW K = 39.10) 3. How many mL of 0.125 M C* must be reacted with 12.00 ml of 0.200 M MnO, if the redox products are Cn0? and Mn2* ?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

1. A students transfers 0.75 millimoles (mM) of baking sode (NaHCO3) in 400 mL of water, has the solution mixed so that the mineral dissolved completely and then fills more water in the volumetric flask until it reads 1.00 liter. Calculate the concentration of baking soda in the solution and express it in (a) mM/L; (b) g/L; (c) mg/L; (d) meq/L; (e) Molarity of solution; (f) Normality of solution; and (g) mg/L as CaCO.
What is the %v/v of a solution made from 141.1 g of ethylene glycol (density is 1.11 g/mL) in water (density 1.00 g/mL) to form a total volume of 500.0 mL? You may assume the density of ethylene glycol does not change in the solution.
39. At 20°C, a 0.376 M aqueous solution of ammonium chloride has a density of 1.0045 g/mL. Whatis the mass % of ammonium chloride in the solution? The formula weight of NH4Cl is 53.50g/mol.
A student mixes 7.0 mL of 6.0M acetone solution with 6.0 mL of 5.0 M HCI solution and then adds 16.0 mL water to the mixture. What is the molarity (in M) of acetone in the mixture?
25.8 mL of a 5.3 % v/v solution of calcium nitrate is used to prepare a solution with a total volume of 210.0 mL. What is the concentration of the new solution in units of %v/v? Do not include units in your answer.
What is the molarity of sodium chloride in solution that is 13.0 % by mass sodium chloride and that has a density of 1.01 g/mL?
A 2.1182.118 g sample of a solid mixture containing only potassium carbonate (MM=138.2058 g/molMM=138.2058 g/mol) and potassium bicarbonate (MM=100.1154 g/molMM=100.1154 g/mol) is dissolved in distilled water. A volume of 30.1030.10 mL of a 0.7570.757 M HCl standard solution is required to titrate the mixture to a bromocresol green end point. Calculate the weight percent of potassium carbonate and potassium bicarbonate in the mixture.
A 25.0 mL sample of a 30.0%(w/w) HF solution has a density of 1.101 g/mL. The sample is diluted to a volume of 0.500 L. What is the molarity of the final solution?
a) Luminol has a molecular weight of 177 g/mol. The forensic technician at a crime scene has just prepared a luminol stock solution by adding 12.0 g of luminol into a total volume of 75.0 mL of H2O. What is the molarity of the stock solution of luminol? Express your answer with the appropriate units. b) Before investigating the scene, the technician must dilute the luminol solution to a concentration of 4.00×10−2 M . The diluted solution is then placed in a spray bottle for application on the desired surfaces. How many moles of luminol are present in 2.00 L of the diluted spray? Express your answer with the appropriate units.
If 426 mL of 0.204 M HCI solution is needed to neutraize a solution of Ca(OH)2, how many grams of Ca(OH)); must be in the solution? Express the mass in grams to three significant digits.
A student weighs out a 16.7 g sample of Ba(CH3 COO)2 , transfers it to a 300. mL volumetric flask, adds enough water to dissolve it and then adds water to the 300. mL tick mark. What is the molarity of barium acetate in the resulting solution? Molarity = | M A student weighs out a 24.1 g sample of Cr2 (SO4)3, transfers it to a 500. mL volumetric flask, adds enough water to dissolve it and then adds water to the 500. mL tick mark. What is the molarity of chromium(III) sulfate in the resulting solution? Molarity = M
A student weighs out a 3.62 g sample of NaCH3COO , transfers it to a 300. mL volumetric flask, adds enough water to dissolve it and then adds water to the 300. mL tick mark. What is the molarity of sodium acetate in the resulting solution? Molarity =______ M