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Phosphoric Acid, Iron in Serum, and pH of a Mixture1.In the laboratory you have prepared various reagents for your experiments. briefly describe the preparation of 3.00 L of 0.150 M H3PO4 from concentrated commercial reagent. This reagent if 86.0% H3PO4 and has a density of 1.84g/mL. The molar mass of H3PO4 is 97.995 g/mol
2. The following data were obtained for the determination of iron in serum by a spectrophotometeic method. Assuming the validity of Beer's Law for the experiment calcualte the concentration of iron in serum..Sample Absorbance at 562 nm in 1.000 cm cellBlank 0.0383.00 µg Fe standard 0.329Serum sample 0.219
3.What pH do you expect if you mix 25.mL of 0.2M NaOH with 50.0 mL of 0.15 M HNO3 and then dilute to 250.0mL in a volumetric flask?
A 34.32-g sample of a solid is placed in a flask. Liquid toluene, in which the solid is insoluble, is added to the flask so that the total volume of solid and liquid together is 96.44 ml.
Using a solution prepared by adding 467 mL of 0.400 M silver nitrate with 421 mL of 0.503 M sodium phosphate then determines what is the silver ion concentration in? Ksp of silver phosphate = 2.8 × 10-18
Determine How much sodium hydroxide (in grams) is required to form 546 mL of solution with a pH of 10.00?
Determine the mass in gms for pure Ag sample that loses 2.88kJ if its temperature drops from 143 degree celsius to 28 degree celsius.?
Calculate the concentration of ions in the following solutions, [I] in AgI in AgI solution with [Ag+] = 9.6E-9 M Ksp=8.3E-17
Describe the nature and characteristics of PCB's. Why are they of importance to an EH&S or FS professional who encounters them when coming upon an incident scene where they are present?
Europium (Europium is a chemical element with the symbol Eu and atomic number 63 )crystallizes in a body-centered cubic lattice compute the unitcell edge length in pm if The density of Eu is 5.26 g/cm3..
calculate the mass in grams of NaCl Present in each of the following solution A. 11.5 g Of 6.25 % NaCl Solution B. 6.25 g of 11.5 % NaCl solution
a sample of gas occupoes 17ml at -112 degrees C. what volume does the sample occupy at 70 degrees C.
A solution is made by mixing 506 mL of water and 198 mL ethanol. What is the concentration of ethanol in units of volume/volume percent.
How much ammonium hydroxide is needed to react completely with 75.0g of copper (2) nitrate in a double replacement reaction.
A steel tank has a volume of 438 liters and is filled with 0.885 kg of Oxygen. Calculate the pressure of oxygen at 21 degrees Celsius.
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