A sample taken from a river has a pH of 7.8. Analysis shows that the concentration of HCO3- in the water is 95 mg/L. Assuming water is 25 degrees celcius, determine the alkalinity of this water.
A sample taken from a river has a pH of 7.8. Analysis shows that the concentration...
A sample of water from Brazos River at Brenham was collected and analyzed by PVAMU students for water quality characteristics. The following data was reported on the chemical analysis. The temperature and pH of the water are 25°C and 7.2, respectively. 9. Ion Conc. g/m3 84.6 Ca+2 Mg+2 32.2 Na+ 53.2 12.6 0.85 Fe+3 нсоз. | 256.9 SO42 88.9 CO32 14 Cl- 99.7 Calculate the concentration of ions in eq/m3 and mg/l as CaCOs (show AW and EW for each...
A sample of water at pH 10.5 has 39.0 mg/L of CO32 and 24 mg/L of HCO3 a) Ignoring the contribution of [H] and [OH] to alkalinity, what is the alkalinity as CaCO3? b) Include the contribution of [H] and [OH], find the alkalinity as CaCO3
1a.) From water sample, 10 mg/L HCO3- as CaCO3, 10 mg/L CO3- as CaCO3 and 50 mg/L Ca+ as CaCO3 were measured. pH was near neutral. What is alkalinity? _____ mg/L as CaCO3 1b.) From water sample, 10 mg/L HCO3- as CaCO3, 10 mg/L CO3- as CaCO3 and 50 mg/L Ca+ as CaCO3 were measured. pH was near neutral. What is alkalinity? _____ mg/L as CaCO3 1c.) Calculate Ksp = _____ A2BO3 ->2A++ BO32- Molar concentration of A+ = Molar...
(6 points) A chemical analysis of a surface water sample yields the following data: Concentration (mg/L) Ion Ca2+ Mg2+ Fe2 K+ CI SO..2 HCO, CO;2- pH a. Find the alkalinity (in mol/L) b. Find the hardness as mg CaCO/L.
The pH of a sample of water from a river is 5.0. A sample of effluent from a food processing plant has a pH of 4.0. The concentration of hydronium ion in the effluent is... A. 100 times (100x) larger than the river hydronium ion concentration B. two times (2x) larger than the river hydronium ion concentration C. ten times (10x) larger than the river hydronium ion concentration D. one times (1.0x) larger than the river hydronium ion concentration
What is the pH of a sample of river water in which (HCO3-) = 2.0 x 10-4 M and the concentration of dissolved CO2 in equilibrium with atmospheric CO2 is 1.0 x 10-5 M? Chemical Equation: H2CO3(aq) + H2O(l) = HCO3-(aq) + H3O+(aq) pka = 6.37 Henderson Hasselbach equation: pH=pka+log [base]/[acid] A/
2. Given the following test results, determine the alkalinity and hardness in milligrams per liter as CaCOs for the water sample assuming the pH is 6.5 and temperature is 20°C. Concentration Cation Ca2+ Mg2+ Na+ Concentration mg/L 40.0 12.2 15.1 5.1 Anion HCO3 SO mg/L 91.5 22.9 72 Cl.. NO3 5.0
A sample of water has the following concentrations of ions (and pH = 7.0): cations mg/L anions mg/L Ca+2 40.0 HCO3- 110.0 Mg+2 10.0 SO42- 67.2 Na+ ? Cl- 11.0 K+ 7.0 Assuming no other constituents are missing, use an anion-cation balance to estimate the concentration of Na+ (in mg/L as Na+)? Remember that the balance cannot be in mg/L.
Alkalinity: The approximate alkalinity of a water sample is 2.21 x 10-2 M at pH=10.33. Determine the concentration of carbonate (CO32-) in M and mg/L as CaCO3. (pKa=10.33). Answer: [CO32-] = 7.37x10-3 M and 737 mg/L as CaCO3 Please show the solution to this problem.
11. The West Virginia Water Research Institute reported the following water qual ty measurements for the Monongahela River monitoring station at Mile 89 for August 2010 Mg2+ 10.6 mg/L CI15.9 mg/L so2146 mg/L pH 7.79 ALK 59.9 mg/L as CaCO Na 44.7 mg/L Ca2 39.8 mg/L (a) Determine the concentration of dissolved inorganic carbon (DIC) in the water in mol/L and in mg/L, assuming that HCO is the only significant contributor to ALK and DIC (b) Check the cation-anion balance...