A water contains 180 mg/l Ca, 75 mg/l Mg, 160 mg/l HCO3', and 150 mg/l CO2, all expressed as CaCO3. Assume that water is to be softened to a final Ca-hardness of 60
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- Calculate the concentration of Ca**, Cl in mM/L and meq/L; and hardness in mg/L as CaCO3 produced by the addition of 200 mg/L CaCl, to pure water.Calculate the temporary and total hardness of a water sample containing Mg(HCO3)2= 73mg/L, Ca(HCO3)2= 162mg/L, M9C12= 95mg/L, CaSO4=136mg/L.: Determine the lime and soda ash dose, in mg/L as CaO and Na2CO3, to soften the following water to a final hardness of 80.00 mg/L as CaCO3. The ion concentrations reported below are all as CaCO3. Assume lime is 94 percent pure and soda ash is 93 percent pure. Ca2+ = 155.0; Mg2+ = 62.0; HCO3- = 136.0; CO2 = 12.0
- Calculate the solubility of CdCO3 (Ksp = 5.1 x 10-12) in moles per liter. Ignore any acid–base properties. Calculate the solubility of Sr3(PO4)2 (Ksp = 1.5 x 10-31) in moles per liter. Ignore any acid–base properties.Sixty mL of an impure acid solution was diluted to 500mL. A 30.00mL portion of this solution was titrated with 25.00mL of 0.1230M NaOH solution. Calculate the % (w/v) HAc in the sample. (FWt HAc = 60) Show all the solutions involved and round-off final answers to two decimal places except for Molarity. (Molar concentrations should be in four decimal places)wich solution 0.50M NaCl or 0.25M SrCl2 has larger concen_tration when expressed in μg/mL
- 10. Some of the reported chemical concentrations of water at the pH 7.3 are the 35 mg/L, [CI= 0.8 mg/L, [SO42] following: [Na*] = 65 mg/L, [Mg²*] = 19 mg/L, [Ca2*] 14.3 mg/L. What is the total hardness of water in mg/L CACO3? %3D %3D %3D OA. 78 mg/L as CaCO3 O B. 87 mg/L as CACO3 OC. 156 mg/L as CACO3 OD. 165 mg/L as CaCO3TW O STATES OF MATTER 三 Calculating volume percent composition 3/5 Ma Suppose 345. mL of dioxane and 0.23 L of toluene are mixed, and the final solution has a volume of 0.564 L. Note that the density of dioxane is 1.03 g/mL. Calculate the volume percent of dioxane in this solution. Be sure your answer has the right number of significant digits. | %(v/v) x10 Explanation Check O 2022 McGraw Hill LLC. All Rights Reserved. Terms of Use Privacy Center Accessibility DELL Insert Priscx F10 E RA- Express the concentrations (given for water solutions) in PPm, molarity, and molality: 5 mg S(sulfur) per Liter. (The atomic weight of S-32). B- What is the approximate M and N of 13% solution of H₂SO4 which has a specific gravity of 1.09 ? To what volume should 100mL of the acid be diluted in order to prepare a 1.5N solution ?
- d. 1.10 g of K3PO4 in 430.0 mL of solution Mx+ =| M %3D Mpo, MAssume that a water sample tested has 150 mg/L total hardness. The Mg hardness is 50 mg/L,Ca hardness is 100 mg/L, and bicarbonate alkalinity is 30 mg/L (all concentrations are mg/L as CaCO3). Calculate how much lime and soda ash you would need to add to get the hardness below 50 mg/L.A surface water has the following analysis: Ca- 101 mg/L Mg=4.75 mg/L Nat 14.0 mg/L HCO= 220 mg/L so= 88.4 mg/L C= 21.3 mg/L What is the total hardness, carbonate hardness and non-carbonate hardness in mg/l as CaCO? [Atomic weight: Ca 40; Mg = 24.3; Na 23; H 1: C 12:0= 16: 5=32; C=35.5)