Ca(OH)2 is added to water to reach a concentration of
53 mg/L. Initially, the water had 3.09 mg/L of Mg2+ and
it reacts with Ca(OH)2 according to equation 61a. Assume
SO4-2 is in excess. What are the final
dissolved Ca2+and Mg 2+ concentrations? What
is the initial and final hardness? What is the Mg(OH)2
precipitate concentration? (28.6 mg/L, 0 mg/L, 12.5 mg CaCO3/L,
71.5 mg CaCO3 /L, 7.28 mg/L).
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Ca(OH)2 is added to water to reach a concentration of 53 mg/L. Initially, the water had 3.09 mg/L of Mg2+ and it reacts...
Ca(OH)2 is added to water to reach a concentration of 53 mg/L. Initially, the water had 3.09 mg/L of Mg2+ and it reacts...
Ca(OH)2 is added to water to reach a concentration of 53 mg/L. Initially, the water had 3.09 mg/L of Mg2+ and it reacts with Ca(OH)2 according to equation below. Assume SO4-2 is in excess. What are the final dissolved Ca2+and Mg 2+ concentrations? What is the initial and final hardness? What is the Mg(OH)2 precipitate concentration? Answer should be (28.6 mg/L, 0 mg/L, 12.5 mg CaCO3/L, 71.5 mg CaCO3 /L, 7.28 mg/L). Mg2+ + SO42- + Ca(OH)2 = Mg(OH)2 +Ca2+...
Ca(OH)2 is added to water to reach a concentration of 53 mg/L. Initially, the water had...
Ca(OH)2 is added to water to reach a concentration of 53 mg/L. Initially, the water had 3.09 mg/L of Mg2+ and it reacts with Ca(OH)2 according to equation below. Assume SO4-2 is in excess. What are the final dissolved Ca2+and Mg 2+ concentrations? What is the initial and final hardness? What is the Mg(OH)2 precipitate concentration? Answer should be (28.6 mg/L, 0 mg/L, 12.5 mg CaCO3/L, 71.5 mg CaCO3 /L, 7.28 mg/L). Mg2+ + SO42- + Ca(OH)2 = Mg(OH)2 +Ca2+...
What amount of lime, in mg/L as CaCO3, is required to soften the village of Lime...
What amount of lime, in mg/L as CaCO3, is required to soften the village of Lime Ridge's water to 80 mg/L hardness as CaCO3 Compound Concentration, mg/L as CaCO3 CO2 4.6 Ca2+ 237.9 Mg2+ 62.2 HCO3- 268 SO42- 32.1
3. Determine the lime and soda ash dose, in mg/L as Ca(OH)2 and Na2CO3, to soften...
3. Determine the lime and soda ash dose, in mg/L as Ca(OH)2 and Na2CO3, to soften the water of a village to a final hardness of 40.0 mg/L as CaCO3. Chemical analysis showed that the water contains Na+ (50 mg/L), Ca2+ (150 mg/L), Mg²+ (30 mg/L, HCO3 (100 mg/Las CaCO3), Cl (80 mg/L). and CO2 (5.0 mg/L).
For the water analysis given below, with pH = 8, find the following in ``mg/l as...
For the water analysis given below, with pH = 8, find the following in ``mg/l as CaCO3``: total hardness carbonate hardness noncarbonate hardness Cations mg/l Anions mg/l Na+ 20 Cl- 40 K+ 40 HCO3- 47 Ca2+ 10 CO32- 10 Mg2+ 10 SO4-2 5 Fe2+ 2 NO3- 10
Groundwater is defined by the following analysis: Ca2+ = 80 mg/L as Ca2+ Mg2+ - 55...
Groundwater is defined by the following analysis: Ca2+ = 80 mg/L as Ca2+ Mg2+ - 55 mg/L as Mg2+ HCO3-350 mg/L as CaCO3 pH = 8.0 FORMULA CaCO3 Ca2+ Mg2+ EQUIVALENT WEIGHT (g/EW 50 20 12.2 61 HCO3 mg as CaCO3 L mg Equivalent Weight of CaCo3 (g/EW) as species X L Equivalent Weight of Species (g/EW) Noncarbonate hardness (NCH) of the raw water, in mg/L as CaCO3, is: 1) 55.0 2) 76.3 3) 135.0 4) 200.0 5) 350.0
Determine the lime and soda ask dose, in mg/L as CaCOs to soften the following water...
Determine the lime and soda ask dose, in mg/L as CaCOs to soften
the following water to a final hardness of 70.0 mg/L as CaCO3. The
ion concentrations reported below all as CaCO3.
6-16. Determine the lime and soda ash dose, in mg/L as CaCO3 to soften the following water to a final hardness of 70.0 mg/L as CaCO3. The ion con- centrations reported below are all as CaCO2 Ca2+ 220.0 Mg2+一75.0 HCO3 265.0 CO2 17.0 Answers: Total lime addition-...
Determine the lime and soda ash dose, in mg/l as CaCO3, to soften the following water...
Determine the lime and soda ash dose, in mg/l as CaCO3, to soften the following water to a final hardness of 80 mg/l as CaCO3. The ion concentrations reported below are all in mg/l as CaCO3. Ca2+ = 120 Mg2+ = 30 HCO3- = 70 CO2 = 10
1. (35 pts) The following balanced chemical equations represent the use of lime [Ca(OH)2] for softening...
1. (35 pts) The following balanced chemical equations represent the use of lime [Ca(OH)2] for softening of drinking water. First step: lime added and all CO2 precipitates as CaCO3 Ca(OH)2 + + CO2 – CaCO3 + H20 Second step: more lime added and all Ca²+ and HCO3- precipitate as CaCO3 Ca(OH)2 + Ca²+ + 2HCO3 – 2CaCO3 + 2H20 Third step: more lime added and Mg2+ and HCO3 are converted to MgCO3 which does not precipitate (also more Cacos precipitate...
The total hardness a water sample is 200 mg/l as CaCO3. The calcium (Ca2+) concentration is...
The total hardness a water sample is 200 mg/l as CaCO3. The calcium (Ca2+) concentration is 50 mg/l. Calculate the magnesium (Mg2+) concentration, in mg/l.
3. Determine the lime and soda ash dose, in mg/L as Ca(OH)2 and Na2CO3, to soften the water of a village to a final hardness of 40.0 mg/L as CaCO3. Chemical analysis showed that the water contains Na+ (50 mg/L), Ca2+ (150 mg/L), Mg²+ (30 mg/L, HCO3 (100 mg/Las CaCO3), Cl (80 mg/L). and CO2 (5.0 mg/L).
Groundwater is defined by the following analysis: Ca2+ = 80 mg/L as Ca2+ Mg2+ - 55 mg/L as Mg2+ HCO3-350 mg/L as CaCO3 pH = 8.0 FORMULA CaCO3 Ca2+ Mg2+ EQUIVALENT WEIGHT (g/EW 50 20 12.2 61 HCO3 mg as CaCO3 L mg Equivalent Weight of CaCo3 (g/EW) as species X L Equivalent Weight of Species (g/EW) Noncarbonate hardness (NCH) of the raw water, in mg/L as CaCO3, is: 1) 55.0 2) 76.3 3) 135.0 4) 200.0 5) 350.0
Determine the lime and soda ask dose, in mg/L as CaCOs to soften
the following water to a final hardness of 70.0 mg/L as CaCO3. The
ion concentrations reported below all as CaCO3.
6-16. Determine the lime and soda ash dose, in mg/L as CaCO3 to soften the following water to a final hardness of 70.0 mg/L as CaCO3. The ion con- centrations reported below are all as CaCO2 Ca2+ 220.0 Mg2+一75.0 HCO3 265.0 CO2 17.0 Answers: Total lime addition-...
1. (35 pts) The following balanced chemical equations represent the use of lime [Ca(OH)2] for softening of drinking water. First step: lime added and all CO2 precipitates as CaCO3 Ca(OH)2 + + CO2 – CaCO3 + H20 Second step: more lime added and all Ca²+ and HCO3- precipitate as CaCO3 Ca(OH)2 + Ca²+ + 2HCO3 – 2CaCO3 + 2H20 Third step: more lime added and Mg2+ and HCO3 are converted to MgCO3 which does not precipitate (also more Cacos precipitate...
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