1.“Slaked lime,” Ca(OH)2, is produced when water reacts with “quick lime,” CaO. If you start with...
1.“Slaked lime,” Ca(OH)2, is produced when water reacts with “quick lime,” CaO. If you start with 2400 g of quick lime, add excess water, and produce 2060 g of slaked lime, what is the percent yield of the reaction?
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1.“Slaked lime,” Ca(OH)2, is produced when water reacts with “quick lime,” CaO. If you start with...
Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide: CaO(s) + H20(1)...
Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide: CaO(s) + H20(1) – Ca(OH)2(s) In a particular experiment, a 4.50-g sample of Cao is reacted with excess water and 5.45 g of Ca(OH), is recovered. What is the percent yield in this experiment? 6.47 91.6 1.21 121
03 Question (1 point) The solubility of slaked lime, Ca(OH)2, in water is 0.185 g/100.0 mL....
03 Question (1 point) The solubility of slaked lime, Ca(OH)2, in water is 0.185 g/100.0 mL. 1st attempt Feedback IM! See What volume of 3.00x103 MHCl is needed to neutralize 13.5 mL of a saturated Ca(OH)2 solution? * 227 x 104 mL 2 OF 4 QUESTIONS COMPLETED 030 > + VIEW:
The solubility of slaked lime, Ca(OH)2, in water is 0.185 g/100.0 mL. What volume of 3.85×10-3...
The solubility of slaked lime, Ca(OH)2, in water is 0.185 g/100.0 mL. What volume of 3.85×10-3 M HCl is needed to neutralize 13.5 mL of a saturated Ca(OH)2 solution? The answer is in mL.
Five Questions, 10 pts each 50 pts total 1. Calcium oxide reacts with water in a...
Five Questions, 10 pts each 50 pts total 1. Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide: CaO(s) + H2O(1) Ca(OH)2(s) A 5.00-g sample of CaO is reacted with 4.83 g of H20. Determine the limiting reagent and the excess reagent. How many grams of the excess reagent will remain after the reaction is complete? 2. If the percent yield for the following reaction is 75.0%, and 25.0 g of NO2 are consumed in the...
CaO can be used as a drying agent. One such application occurs when water is added to dry concrete or cement. The react...
CaO can be used as a drying agent. One such application occurs when water is added to dry concrete or cement. The reaction that occurs is CaO(s)+H2O(l)⇌Ca(OH)2(s) The product is commonly called slaked lime. Assuming ambient standard temperature of 298.15 K, calculate ΔStotal for this reaction using table from the table below. Substance S∘ [J/(K⋅mol)] ΔH∘f (kJ/mol) CaO(s) 39.9 −635.1 H2O(l) 69.9 −285.8 Ca(OH)2(s) 83.4 −986.1
CaO can be used as a drying agent. One such application occurs when water is added to dry concrete or cement. The react...
CaO can be used as a drying agent. One such application occurs when water is added to dry concrete or cement. The reaction that occurs is CaO(s)+H2O(l)⇌Ca(OH)2(s) The product is commonly called slaked lime. Assuming the commonly used standard-state temperature of 25∘C, calculate ΔSuniv for this reaction using table from the table below. Substance S∘ [J/(K⋅mol)] ΔH∘f (kJ/mol) CaO(s) 39.9 −635.1 H2O(l) 69.9 −285.8 Ca(OH)2(s) 83.4 −986.1
answer questions 1,2,3 DQuestion 1 2 pts Pentacarbonyliron (Fe(CO)s) reacts with phosophorous triflouride (PF3) and...
answer questions 1,2,3
DQuestion 1 2 pts Pentacarbonyliron (Fe(CO)s) reacts with phosophorous triflouride (PF3) and hydrogen, releasing carbon monoxide according to the reaction below. If you combine 11.6 moles of Fe(CO)s. 81.6 moles of PF3, and 90 moles of H2, how many moles of Fe(CO)2(PF3)2(H2)2 are formed? Fe(CO)5 (s) + 2 PF3 (s) + 2 H2 (g)--Fe(CO)2(PF3)2(H2)2 (s) + 3 CO (g) uestion2 2 pts What is the percent yield of the following reaction if 23.4 grams of NH3 are...
PART 2 Q1(10 pts.) CaO can be used as a drying agent. One such application occurs...
PART 2 Q1(10 pts.) CaO can be used as a drying agent. One such application occurs when water is added to dry concrete or cement. The reaction that occurs is: Cam(s) +H2O(1) = Ca(OH)2(s) The product is commonly known as slaked lime. Using the table below at 25°C, calculate the entropy of the universe. Is this an spontaneous process? Explain sº AH Substance [J/(K·mol)] (kJ/mol) | CaO(s) | 39.9 -635.1 H2O(1) 69.9 -285.8 Ca(OH)2 (s) 83.4 83.4 -986.1
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 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).
Precipitation of noncarbonate Mg, leaving Ca from lime in solution. Mf+...
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...
Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide: CaO(s) + H20(1) – Ca(OH)2(s) In a particular experiment, a 4.50-g sample of Cao is reacted with excess water and 5.45 g of Ca(OH), is recovered. What is the percent yield in this experiment? 6.47 91.6 1.21 121
03 Question (1 point) The solubility of slaked lime, Ca(OH)2, in water is 0.185 g/100.0 mL. 1st attempt Feedback IM! See What volume of 3.00x103 MHCl is needed to neutralize 13.5 mL of a saturated Ca(OH)2 solution? * 227 x 104 mL 2 OF 4 QUESTIONS COMPLETED 030 > + VIEW:
Five Questions, 10 pts each 50 pts total 1. Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide: CaO(s) + H2O(1) Ca(OH)2(s) A 5.00-g sample of CaO is reacted with 4.83 g of H20. Determine the limiting reagent and the excess reagent. How many grams of the excess reagent will remain after the reaction is complete? 2. If the percent yield for the following reaction is 75.0%, and 25.0 g of NO2 are consumed in the...
answer questions 1,2,3
DQuestion 1 2 pts Pentacarbonyliron (Fe(CO)s) reacts with phosophorous triflouride (PF3) and hydrogen, releasing carbon monoxide according to the reaction below. If you combine 11.6 moles of Fe(CO)s. 81.6 moles of PF3, and 90 moles of H2, how many moles of Fe(CO)2(PF3)2(H2)2 are formed? Fe(CO)5 (s) + 2 PF3 (s) + 2 H2 (g)--Fe(CO)2(PF3)2(H2)2 (s) + 3 CO (g) uestion2 2 pts What is the percent yield of the following reaction if 23.4 grams of NH3 are...
PART 2 Q1(10 pts.) CaO can be used as a drying agent. One such application occurs when water is added to dry concrete or cement. The reaction that occurs is: Cam(s) +H2O(1) = Ca(OH)2(s) The product is commonly known as slaked lime. Using the table below at 25°C, calculate the entropy of the universe. Is this an spontaneous process? Explain sº AH Substance [J/(K·mol)] (kJ/mol) | CaO(s) | 39.9 -635.1 H2O(1) 69.9 -285.8 Ca(OH)2 (s) 83.4 83.4 -986.1
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).
Precipitation of noncarbonate Mg, leaving Ca from lime in solution. Mf+...
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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