A water sample contains a 4:1 molar ratio of bicarbonate to carbonate at a pH of 8.5. The alkalinity of the sample is 75 mg/L as CaCO3. Determine the mg/L values of bicarbonate and carbonate in the solution.
A water sample contains a 4:1 molar ratio of bicarbonate to carbonate at a pH of...
9. Given that water contains 10 mg/L of bicarbonate at pH 5, what is the alkalinity in mg/Las CaCO,? 10. Report the alkalinity (in mg/L as Caco,) for that contains 10 mg/L of bicarbonate but has pH 10.
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.
A student is running a titration in the laboratory to determine the alkalinity (Total, bicarbonate and carbonate, hydroxide) of a drinking water sample. The initial pH of the sample is 11.6; 0.02N H2SO4 is used as the titrant; and the sample volume subjected to the titration is 100 mL (0.1L). The results of the titrations were as follows: 18.3 (volume of titrant to drop the pH from 11.6 to 8.3) = 10.0 mL; V4.5 (volume of titrant to drop the...
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2. For the following, assume pKi = 6.35 and pK2 10.33. (a) The alkalinity and initial pH of a water sample are measured to be 0.01 eq/L and 6.35. What are the bicarbonate and carbonate concentrations in mol/L? Answer: 0.01 Mand 0 (b) The alkalinity and initial pH of a water sample are measured to be 500 mg/L as CaCO3 and 10.33. What are the bicarbonate and carbonate concentrations in mg/L? Answer: 199 and 196 mg/L...
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...
#1 [5 pts) A water sample contains 60 mg/L of calcium, 60 mg/L of magnesium, and 25 mg/L of sodium. Assuming the alkalinity of the water is 394 mg/L CaCO3. Estimate Total Hardness, Carbonate Hardness, and Noncarbonate Hardness using all polyvalent cations.
#1 A water sample contains 60 mg/L of calcium, 60 mg/L of magnesium, and 25 mg/L of sodium. Assuming the alkalinity of the water is 394 mg/L CaCO3. Estimate Total Hardness, Carbonate Hardness, and Noncarbonate Hardness using all polyvalent cations. #2 What is the % error using only the predominant cations? #3 Construct a bar chart to determine the speciation of the hardness
A water sample has a total hardness of 275 mg/L as CaCO3 and a total alkalinity of 320 mg/L as CaCO3. What are the carbonate and non-carbonate hardness (in mg/L as CaCo2) of the water sample? Use the relationship when alkalinity < total hardness, carbonate hardness(mg/L) - alkalinity(mg/L) and when alkalinity >/= total hardness Carbonate hardness(mg/L) -totalk hardness(mg/L) if necessary
test for common ions are run on a sample of water
Fall Semester, 2018 Tutorial 4 Tests for common ions are run on a sample of water and the results are shown below HCO, 165mg/L so'. 173 mg/L cr = 202 mg/L Draw a milliequivalent-per-iter bar diagram and determine the error in the ion balance. L. Na+ Mg> Ca2+ 124 mg/L 28 mg/L 70 mg/L = = 2. A laboratory measures the following concentrations of ions in a sample of...
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....