how much alkalinity, expressed in mg/L as CaCO3, would you expect to be consumed in a...
To pH of 8.3 To pH of 4.5 0 320 Alkalinity. Wastewater Problem. Determine the alkalinity in mg/L CaCOs for DI water and tap water based on the number of digits (digits= mg/L CaCO3 in 100 ml) Assuming that 25mg/L of filter alum [Al2(SO4)3-14.3 H2O] with MW-600 was used for coagulation, determine the total amount of alkalinity consumed in mg/L CaCOs from coagulation and flocculation. Is the amount of alkalinity consumed from coagulation less than, equal to, or greater than...
A water with a pH of 9.0 contains 20 mg/L CO3-2 and 55 mg/L HCO3-. Calculate the alkalinity of the water expressed as meq/L (milli equivalents per liter) and as mg/L as CaCO3.
2. Determine the approximate alkalinity (in mg/L as CaCO3) for a water which has 127.3 mg/L of bicarbonate ions and 18.5 mg/L of carbonate ions.
A solution has a pH of 7.3 and an alkalinity of 25 mg/L as CaCO3. Essentially all the alkalinity is contributed by the carbonate system. The water also contains 10^(-4) M Fe2+ (5.5 mg Fe2+/L). To remove the iron, oxygen is injected into the solution, converting the Fe2+ to Fe3+; the Fe3+ then precipitates as ferric hydroxide according to the following reaction: Fe2+ 1/4O2 + 2.5H20 -> Fe(OH)3 + 2H+. Calculate the pH of water after the reactions are complete....
2. A dose of 41 mg/L of alum is used in coagulating a turbid water at a water treatment plant treating a flow rate of 32 million gallons per day (mgd). The natural alkalinity of the source water is 10 mg/L (as CaCO3). a. Will the alkalinity be completely consumed in the reaction? If not, then how much alkalinity will be left? If so, then what concentration of caustic soda (NaOH) must be added to avoid a change in the...
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...
You have a water with CaCO3 content of 201.7 mg/L. Calculate how much calcium chloride or distilled water would be needed to increase CaCO3 content to 250 mg/L.
A JAR test was conducted on untreated water with an initial turbidity of 10 NTUs and a HCO3- concentration of 50 mg/L as CaCO3. From the data obtained from the JAR test, the estimate optimum alum dosage of turbidity removal is 20 mg/L. Alum is added as dry alum (molecular weight is 594 g/mole). Calculate the theoretical amount of alkalinity that will be consumed at the optimal dose
) How much heat would be needed to convert 2.5 Kg of limestone (CaCO3) to calcium oxide according to the thermochemical equation shown below? MW CaCO3 100.1 g/mol (7 points) CaCO3(s)-, CaO(s) + CO2(g) H-+177KJ/mol
How much calcium bicarbonate (kg/day) will need to be added per day in water with alkalinity of 30 mg/L CaCO3 (assume for simplicity only bicarbonate alkalinity is present) if 794 kg of Al2(SO4)3 x18H2O is added per week to treat water with coagulation/flocculation in a water treatment plant with capacity of 1 MGD. Consider the following coagulation/flocculation (unbalanced) reactions occur: Al3+ + HCO3– → Al(OH)3 + CO2