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Prepare 50ml of approximately 1000ppm Mn stock solution from MnCl2*4H2)
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- Prepare 0.1N H2SO4 solution of 250ml volume. (Density of H2SO4 is 1.84 and purity is 98 %)Find the normality of 0.0294 g K2Cr2O7 (MM = 294.19) dissolved in 125 mL solution.Prepare 1500mL of 0.5N H2SO4 solution with specific gravity of 1.84g/mL and assay of 97%. Write complete solution using padpaper.
- Prepare the following solutions: 100.0 mL 0.0500 M stock Ca2+ solution 50.0 mL 0.0050 M working standard Ca2+ solution from 0.0500 M Ca2+What is the molarity of a solution in which 150g of CaO are dissolved in 1900mL of solution? (Use thefollowing given information: overline MW:Ca=40g/mol , O=16g/molA. 1.41 mol/LB. 0.0014 mol/LC. 0.0014 MD. 1.41 mPrepare 1500mL of 0.5N H2SO4 solution with specific gravity of 1.84g/mL and assay of 97%
- A stock solution of 75% v/v ethanol was diluted with distilled water to prepare 1L of 42% v/v ethanol. (Density of ethanol = 0.789 g/mL; MW of ethanol = 46 g/mol). What is the molarity of 10.0 mL of 75% v/v ethanol?What volume of 10 ma/m % KOH solution is needed (with a density of 1.09 g/cm3) toneutralize 25 cm3 15 m/v % acetic acid solution?MM [CH3COOH] = 60 g/molMM [KOH] = 56.1 g/molPrepare 25ppm of Cd (NO3 )2.4H2O in a 500ml from 1000ppm stock solution of Cd (NO3)2.4H2O
- I wish to prepare 500.0 mL of a 825.0 ppm w/v Fe2+ (MW=55.845 g/mol) solution. How many grams of ferrous ammonium sulfate hexahydrate (Fe(NH4)2(SO4)2⋅6H2O MW=392.14 g/mol) are needed to prepare this solution? Assume the final solution has a density of 1.00 g/mL. And! Determine the concentrations of Na2CO3, Na+, and CO32− in a solution prepared by dissolving 2.20 × 10−4 g Na2CO3 in 1.00 L of water. Express all three concentrations in molarity. Additionally, express the concentrations of the ionic species in parts per million (ppm). Note: Determine the formal concentration of CO32−. Ignore any reactions with water. Thank you!Calculate the formality and normality of a commercial solution of H2SO4 whose purity is 97% and its density is 1.82 g/mL.MW of H2SO4= 98.0 g/molA series of iron standard solutions need to be made from a 40 ppm iron stock solution provided. For the first dilution, pipet 5.00 mL of the 40 ppm stock solution into a 100.00 mL volumetric flask and dilute to mark. What is the new concentration of the diluted solution?