A solution has a pH of 7.3 and an alkalinity of 25 mg/L as CaCO3. Essentially...
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.
(There is a similar solution for this on Chegg but I think it is
incorrect as it did not take the presence of alkalinity into
account)
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A solution has a pH of 7.3 and an alkalinity of 25 mg/L as
CaCO3. Essentially...
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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
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(35 points) For the following water sample please complete the table (meq/L and mg/L as CaCO3) and the questions that f...
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. A water sample has the following constituents Ca, mg/L 12 Mg-2, mg/L39 Na mg/L 12.8...
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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 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
(35 points) For the following water sample please complete the table (meq/L and mg/L as CaCO3) and the questions that follow (Remember - 50 mg CaCO3/meq CaCO3) lon mg/L mg/meq meq/L (Please fill in the values below) as CaCO3 mg/L HCO3 125 61.0 2- 35 250 30.0 Mg K* Fe2 Mn2+ SO.2 NO3 NO2 Ca2 12.2 100 39.1 27.9 175 12 27.5 300 48.0 62.0 2 0.1 46.0 155 125 20.0 CI Na* 35.5 25 23.0 pH 7.0 (15 points)...
. A water sample has the following constituents Ca, mg/L 12 Mg-2, mg/L39 Na mg/L 12.8 K-, mg/L 3.4 Fe-, mg/L6.2 Mn-, mg/L 0.3 HCO mg/L 422 SO mg/L 101 CI mg/L 32 co,2mg/L 1.2 Temperature 25 C a. Calculate pH of that water b. Calculate the alkalinity (exactly, including effects of protons and hydroxyl ions); express alkalinity as mg/L CaCO e. Draw a bar chart for the water, Express all concentrations as mg/L CaCO, (The easiest way to do...
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