- Please Help With Questions A E 1 (50.2 KiB) Viewed 42 times
Please help with questions a-e
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Please help with questions a-e
Please help with questions a-e
a. Calculate the molarity and normality of a 140.0 mg/L solution of H₂SO4; find the concentration of the same solution in units of "mg/L as CaCO3". b. For a water containing 100.0 mg/L of bicarbonate ion and 8 mg/L of carbonate ion, what is the exact alkalinity if the pH is 9.40? What is the approximate alkalinity? c. What is the pH of a 25 °C water sample containing 0.750 mg/L of hypochlorous acid assuming equilibrium and neglecting the dissociation of water? If the pH is adjusted to 7.4, what is the resulting OCI concentration? d. A groundwater contains 1.80 mg/L of Fe³+, what pH is required to precipitate all but 0.200 mg/L of the iron at 25 °C? e. A buffer solution has been prepared by adding 0.25 mol/L of acetic acid and 0.15 mol/L of acetate. The pH of the solution has been adjusted to 5.2 by addition of NaOH. How much NaOH (mol/L) is required to increase the pH to 5.4?
a. Calculate the molarity and normality of a 140.0 mg/L solution of H₂SO4; find the concentration of the same solution in units of "mg/L as CaCO3". b. For a water containing 100.0 mg/L of bicarbonate ion and 8 mg/L of carbonate ion, what is the exact alkalinity if the pH is 9.40? What is the approximate alkalinity? c. What is the pH of a 25 °C water sample containing 0.750 mg/L of hypochlorous acid assuming equilibrium and neglecting the dissociation of water? If the pH is adjusted to 7.4, what is the resulting OCI concentration? d. A groundwater contains 1.80 mg/L of Fe³+, what pH is required to precipitate all but 0.200 mg/L of the iron at 25 °C? e. A buffer solution has been prepared by adding 0.25 mol/L of acetic acid and 0.15 mol/L of acetate. The pH of the solution has been adjusted to 5.2 by addition of NaOH. How much NaOH (mol/L) is required to increase the pH to 5.4?