Determine the percentage Fe in a sample of limonite from the following data: -Sample : 0.5000g -KMnO4 used = 50.00 ml -1.000ml of KMnO4 is equivalent to 0.005317 g Fe
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Determine the percentage Fe in a sample of limonite from the following data:
-Sample : 0.5000g
-KMnO4 used = 50.00 ml
-1.000ml of KMnO4 is equivalent to 0.005317 g Fe
-FeSO4 used = 6.00 ml
-1.000ml FeSO4 is equivalent 0.009200 g FeO
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- Determine the percentage Fe in a sample of limonite from the following data:Sample : 0.5000g ; KMnO4 used = 50.00 ml ; 1.000ml of KMnO4 is equivalent 0.005317 g Fe,FeSO4 used = 6.00 ml; 1.000ml FeSO4 is equivalent 0.009200 g FeO ( ans 44.59 %)A solid sample contains unknown amounts of potassium and magnesium chloride and moisture. 1.193 g of the sample is dissolved in water and the solution is diluted to 250.00 mL. 25.0 mL of the sample is allowed to pass through an H + -saturated cation exchanger, the eluate consuming 22.03 mL of a 0.100 M NaOH solution. The moisture content of the sample was determined to be 5.22%. Calculate the % by weight of potassium and magnesium chloride in the sample.A salt solution (30% Na2CO3) weighing 1ton iscooled to 20C where the salt crystallizes asdecahydrate. What will be the crystal yield ifthe solubility is 21.5 kg anhydrous Na2CO3/100kg water? (assume that 3% of the totalsolution is lost by evaporation)
- The total cation content of natural water is often determined by exchanging the cations for hydrogen ions on a strong acid ion-exchange resin. A 25.00 mL sample of a natural water was diluted to 100.00 ML with distilled water, and 2.06 g of a cation - exchange resin was added. After stirring, the mixture was filtered and the solid remaining on the filter paper was washed with three 15.00 mL portions of water. The filtrate and washings required 16.30 mL of 0.0282 M NaOH to give a bromocresol green end point. a) Calculate the number of millimoles of cation present in exactly 1.00 L of sample. b ) Report the results in terms of milligrams of CaCO3 per liter. Only typed solution.The solubility of Ag2SO3 is 5.5x10-3 g/L. Determine the Ksp. (MW of Ag2SO3=295.8 g/mole)A solution containing 25.0 mL of H2C2O4 required 13.78 mL of 0.04162 N KMnO4 for titration forming Mn2+ and CO2 as products. Calculate the normality and molarity of the H2C2O4..
- What's the average concentration of NH3 in the commercial cleaning solution using the data Volume of Cleaning solution 10.00 for all 3 trials, molarity of HCl 0.0530 for all 3 trials, Volume of HCl first trial is 4.8 second trial is 4.4 and third trial is 4.4, Molarity of NH3 in cleaning solution first trial is 0.0254 second trial is 0.0233 and third trial is 0.0233. What's the diluted solution in all 3 trials?An impure sample of Na3PO3 weighing 0.1 g is dissolved in 35 mL of water. A solution containing 45 mL of 3% w/v HgCl2, 30 mL of 10% w/v sodium acetate, and 10 mL of glacial acetic acid is then prepared. After digesting, filtering, and rinsing the precipitate, 0.2857 g of Hg2Cl2 is obtained. Report the purity of the original sample as % w/w Na3PO3.A chemist receive different mixtures for analysis with the statement that it contain NaOH, NaHCO3 , Na2CO3 or compatible mixtures of these substances together with the inert material. From the data given, identify the respective materials and calculate the percentage of each component. 1.000g samples and 0.2500 N HCl were used in all cases. Sample 1 With phenolphthalein as the indicator, 24.32 ml of HCl was used. A duplicate sample required 48.64 ml HCl using methyl orange as the indicator. Sample 2. With phenolphthalein as the indicator it uses 28.2 ml of HCl to make it colorless and added with methyl orange indicator and uses 11.3 ml of HCl to reach the end point.
- Use the follow data below and answer the following questions: Component Concentration (mg/L) CO2 8 Ca2+ 45 Mg2+ 13 Sr2+ 12 Alkalinity 270 Determine the quantity (mass flow) of CaO and Soda Ash using practical solubility limit required to treat hard water taking volumetric flow as 145000 L/d and pH of 7.5 and purity of both reagents as 97%.Although other solvents are available, dichloromethane(CH₂Cl₂) is still often used to “decaffeinate” drinks because thesolubility of caffeine in CH₂Cl₂ is 8.35 times that in water.(a) A 100.0-mL sample of cola containing 10.0 mg of caffeine is extracted with 60.0 mL of CH₂Cl₂. What mass of caffeine re-mains in the aqueous phase? (b) A second identical cola sampleis extracted with two successive 30.0-mL portions of CH₂Cl₂.What mass of caffeine remains in the aqueous phase after each extraction? (c) Which approach extracts more caffeine?Calculate the molarity of the nickel solution. From the following data calculate the normalities of the acid and base solutions: weight of pure Na2CO3 = 0.2448 g; volume of acid = 43.65 mL ; volume of base used in back titration = %3D 0.84 mL ; 1.000 mL of base = 0.982 mL of acid. Reaction: CO, + 2H* → H2CO3
