Calculate the concentration of CuS in a solution in which H3O+ is held constant at (Ksp (CuS) = 8.0 x 10¯37, K₁ (H₂S) = 9.6 × 10−8, K₂(H2S) = 1.3 × 10-14) a. 0.55 M Concentration = b. 5.5 x 104 M Concentration M M
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- Patients undergoing an upper gastrointestinal tract laboratory test are typically given an X-ray contrast agent that aids with the radiologic imaging of the anatomy. One such contrast agent is sodium diatrizoate, a nonvolatile water-soluble compound. A 0.378-m solution is prepared by dissolving 38.4 g sodium diatrizoate (NaDTZ) in.l.60 102 mL water at 3 1.2C (the density of water at 31.2C is 0.995 g/cm3). What is the molar mass of sodium diatrizoate? What is the vapor pressure of this solution if the vapor pressure of pure water at 31.2C is 34.1 torr?Calculate the solubility of PbSO4 solution in which the concentration of Na2SO4 (strong electrolyte) is 0.0008 Ksp for PbSO = 1.6 x 10^-8 a. 2.0X10^-8 b. 2.0X10^-9 c. 2.0X10^-6 d. 2.0X10^-7 e. 2.0X10^-5(b) Using appropriate chemical reactions for illustration, show how calcium present as the dissolved HCO3- salt in water is easier to remove than other forms of hardness, such as dissolved CaCl2. (c) A water has the following analysis: mg/l mg/l Na+ - 20 Cl- - 40 K+ - 30 HCO3- - 67 Ca2+ - 5 CO32- - 0 Mg2+ - 10 SO42- - 5 Sr2+ -2 NO3- - 10 What is the total hardness, carbonate hardness and noncarbonated hardness in mg/l as CaCO3.
- 43. How many moles of NaF must be dissolved in 1.00 liter of a saturated solution of MgF2 at 25°C to reduce the [Mg2+] to 1 x 10¯8 molar? (Ksp of MgF2 at 25°C = 6.4 x 10¯9) (A) 0.64 mole (B) 0.80 mole (C) 0.10 mole (D) 0.064 mole (E) 0.080 moleDenise combines 0.2 g of Mg metal with HCl and gets a final V of 234 mL which completely reacts (Mg + HCl = MgCl2 + H2). Tsolution changes from 23.8 degrees C to 33 degrees C. The solution's density is 1 g/mL and Cs,H2O = 4.18 J/g degrees C. What is qrxn? Given the following: Cgr + O2 = CO2 ΔH = -0.394 J Cdi + O2 = CO2 ΔH = -0.396 J What is the ΔH of the conversion of graphite (Cgr) to diamond (Cdi)?How to prepare these solutions? 250.0 mL 0.125 M stock Na2S2O3 solution from Na2S2O3·5H2O crystals 250 mL 0.10 M NaOHNOTE: Use the 1.0 M NaOH prepared250.0 mL standard 2500 ppm Cu(II) stock solutiona. Weigh and dissolve appropriate amount of Cu(NO3)2·5H2O crystals in enough distilled water.
- 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%.Assuming that no equilibria other than dissolution are involved, calculate the concentration of all solute species in the following solution of salt in contact with a solution containing a common ion. Show that changes in the initial concentrations of the common ions can be neglected (hint: ICE) Ag2CrO4(s) in 0.225 L of a solution containing 0.856 g of K2CrO4 (Ksp=1.1x10-12)Isotonic, hypotonic, or hypertonic 0.1 M sucrose (С12Н22О11) solution to physiological saline (0.9% NaCl) at 300K? Accept that NaCl dissociates by 95%
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