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- How to you calculate the hazard quotient for lead and naphthalene? Please provide examples.100.0 cm3 of a 1.234 mol.dm-3 solution of nickel(II) nitrate was added to 150.0 cm3 of a 1.178 mol.dm-3 solution of sodium carbonate. Determine the limiting reagentWhat are relative advantages and disadvantages of organicsolvent,aqueous two-phase, and supercritical-fluid extraction for recovery of bioproducts?
- There are two forms of HPLC – normal phase HPLC and reversed phase HPLC. In normal phase HPLC, the stationary phase is silica and the mobile phase is a non-polar solvent like hexane. What are the stationary and mobile phases in reversed phase HPLC?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 %)Identify the effect of the condition on the indicated parameter. Write increase, decrease, or no effect , and provide an explanation. The test tube used in the determination of the ΔHrxn for nitric acid was still wet with water. [ magnitude of ΔHrxn].
- The % purity of a powdered crude sample of Na^2CO^3 containing only inert impurities is to be determined by reacting 225.0 mg of the crude sample to 10.0 mL of 3.00 M HCl solution, and bubbling the resulting CO2(g) product in water that is at exactly 29 °C. After the reaction has completed, the level of the liquid inside the eudiometer rests 4.30 cm above the water level in the beaker. The graduation on the eudiometer indicates that the trapped gas is 44.37 mL. The experiment was done under a barometric pressure of 755.2 torr. Write the balanced chemical equation of the reaction in your solutions sheet. What is the sum of all the coefficients of the balanced chemical equation? Determine the pressure of the trapped gas inside the eudiometer in mmHg. Determine the partial pressure of the collected CO^2 in mm Hg. How many millimoles of CO^2 was collected? What is the % purity of the sample to the nearest whole number?The % purity of a powdered crude sample of Na^2CO^3 containing only inert impurities is to be determined by reacting 225.0 mg of the crude sample to 10.0 mL of 3.00 M HCl solution, and bubbling the resulting CO2(g) product in water that is at exactly 29 °C. After the reaction has completed, the level of the liquid inside the eudiometer rests 4.30 cm above the water level in the beaker. The graduation on the eudiometer indicates that the trapped gas is 44.37 mL. The experiment was done under a barometric pressure of 755.2 torr. What is the % purity of the sample to the nearest whole number?What is the simplest CGS unit for "poise"?
- Which properties would be ideal in selecting the compound to be used as a primary standard for quantitative volumetric analysis? HygroscopicVaporLiquidExpensiveSome PurityVolatileNot HydroscopicSolidStableLow Molecular WeightIn gravimetric analysis, volatile electrolyte is used in peptization step a. to form small nucleib. to easily dry precipitatec. to reprecipitate the analyteexplain pleasesodium chloride. Dosage form, qualitative and quantitative analysis?