A 2.1342.134 g sample of a solid mixture containing only potassium carbonate (MM=138.2058 g/molMM=138.2058 g/mol) and...
A 2.1342.134 g sample of a solid mixture containing only potassium carbonate (MM=138.2058 g/molMM=138.2058 g/mol) and potassium bicarbonate (MM=100.1154 g/molMM=100.1154 g/mol) is dissolved in distilled water. A volume of 31.5231.52 mL of a 0.7440.744 M HCl standard solution is required to titrate the mixture to a bromocresol green end point. Calculate the weight percent of potassium carbonate and potassium bicarbonate in the mixture.
K2CO3:_____ wt%
KHCO3:_____ wt%
Homework Answers
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A 2.1342.134 g sample of a solid mixture containing only
potassium carbonate (MM=138.2058 g/molMM=138.2058 g/mol) and...
a. The solubility of potassium hydrogen carbonate (KHCO3) (100.115 g/mol) in water is 33.7 g/100 mL...
a. The solubility of potassium hydrogen carbonate (KHCO3) (100.115 g/mol) in water is 33.7 g/100 mL at 20 oC. Assuming no change in the volume of the water, what is the concentration of a saturated KHCO3 solution at 20 oC? [KHCO3] = ____ M b. How many grams of KHCO3 can be dissolved in 196.5 mL of water at 20 oC?
Is this answer correct? Also, please help me with the 2nd question. 1. A 1.500-g sample of potassium hydrogen carbon...
Is this answer correct? Also, please help me with the 2nd
question.
1. A 1.500-g sample of potassium hydrogen carbonate is decomposed by heating to produce 1.040 g of potassium carbonate. Calculate the theoretical yield and percent yield of K CO. 2 KHCO3() 4 K2CO3(s) + H2O(g) + CO2(g) 1.500, KHEO3(-)x mo Brux Imot tos 138.2.109 K2CO3 100.129 Hle, 2 mot Kaso, x mol becos 1.0351x100 -0.996 2 (100% 1.040g 1.035 g K2CO3 - 100% 2. A 1.750-g sample containing...
A 0.5137 g solid sample containing a mixture of LaCl, (molar mass = 245.26 g/mol) and...
A 0.5137 g solid sample containing a mixture of LaCl, (molar mass = 245.26 g/mol) and Ce(NO3), (molar mass = 326.13 g/mol) was dissolved in water. The solution was titrated with KIO, producing the precipitates La(IO,), and Ce(IO). For the complete titration of both La and Ce+, 42.25 mL of 0.1204 M KIO, was required. Calculate the mass fraction of La and Ce in the sample. mass fraction La: g La g sample mass fraction Ce: g Ce g sample
A 0.52900.5290 g solid sample containing a mixture of LaCl3LaCl3 (molar mass = 245.26 g/mol) and...
A 0.52900.5290 g solid sample containing a mixture of LaCl3LaCl3 (molar mass = 245.26 g/mol) and Ce(NO3)3Ce(NO3)3 (molar mass = 326.13 g/mol) was dissolved in water. The solution was titrated with KIO3KIO3, producing the precipitates La(IO3)3La(IO3)3 and Ce(IO3)3Ce(IO3)3. For the complete titration of both La3+La3+ and Ce3+Ce3+, 42.2742.27 mL of 0.12130.1213 M KIO3KIO3 was required. Calculate the mass fraction of LaLa and CeCe in the sample. mass fraction La:______ g LA/ g Sample mass fraction Ce:______ g Ce/ g Sample
SECTION T O POSTLABORATORY ASSIGNMENT 1. A 1.500-g sample of potassium hydrogen carbonate is decomposed by...
SECTION T O POSTLABORATORY ASSIGNMENT 1. A 1.500-g sample of potassium hydrogen carbonate is decomposed by me vield of K CO. 1.040 g of potassium carbonate. Calculate the theoretical yield and percent yield of 2 bonate is decomposed by heating to produce 2 KHCO3(s) 4 K CO3(s) + H2O(g) + CO2(B) 2. A 1.750-g sample containing potassium hydrogen carbonate is decomposed by heating. If the mass loss is 0.271 g, what is the percentage of KHCO3 in the unknown mixture?...
Sodium carbonate (MM=105.988 g/mol) is a primary standard base that reacts with hydrochloric acid as follows:
Sodium carbonate (MM=105.988 g/mol) is a primary standard base that reacts with hydrochloric acid as follows: Na2CO3 + 2HCI → 2NaCl + H2O + CO2(g) If 39.09 mL of an HCl solution were required to titrate a solution containing 287.5 mg of primary standard Na2CO3, calculate the molarity of the HCl solution.
A 0.6689 g mixture of KCN (MW = 65.116 g/mol) and NaCN (MW = 49.005 g/mol)...
A 0.6689 g mixture of KCN (MW = 65.116 g/mol) and NaCN (MW = 49.005 g/mol) was dissolved in water. AgNO, was added to the solution, precipitating all of the CN in solution as AgCN (MW = 133.886 g/mol). The dried precipitate weighed 1.518 g. Calculate the weight percent of KCN and NaCN in the original sample. KCN wt% = NaCN wt% =
A 0.769 g mixture containing only sodium chloride and potassium chloride was dissolved in water. It...
A 0.769 g mixture containing only sodium chloride and potassium chloride was dissolved in water. It required 36.7 mL of 0.327 M AgNO, to completely precipitate all of the chloride present. What is percent composition by mass of sodium chloride and potassium chloride in the mixture? mass percent NaCl : mass percent KCl :
A 0.733 g mixture containing only sodium chloride and potassium chloride was dissolved in water. It...
A 0.733 g mixture containing only sodium chloride and potassium chloride was dissolved in water. It required 30.8 mL of 0.375 M AgNO, to completely precipitate all of the chloride present. What is percent composition by mass of sodium chloride and potassium chloride in the mixture? mass percent NaCl : mass percent KCl :
A 0.5427 g mixture of KCN (MW=65.116 g/mol) and NaCN (MW=49.005 g/mol) was dissolved in water....
A 0.5427 g mixture of KCN (MW=65.116 g/mol) and NaCN (MW=49.005 g/mol) was dissolved in water. AgNO3 was added to the solution, precipitating all of the CN− in solution as AgCN (MW=133.886 g/mol). The dried precipitate weighed 1.264 g. Calculate the weight percent of KCN and NaCN in the original sample. KCN wt%= % NaCN wt%=
Is this answer correct? Also, please help me with the 2nd
question.
1. A 1.500-g sample of potassium hydrogen carbonate is decomposed by heating to produce 1.040 g of potassium carbonate. Calculate the theoretical yield and percent yield of K CO. 2 KHCO3() 4 K2CO3(s) + H2O(g) + CO2(g) 1.500, KHEO3(-)x mo Brux Imot tos 138.2.109 K2CO3 100.129 Hle, 2 mot Kaso, x mol becos 1.0351x100 -0.996 2 (100% 1.040g 1.035 g K2CO3 - 100% 2. A 1.750-g sample containing...
A 0.5137 g solid sample containing a mixture of LaCl, (molar mass = 245.26 g/mol) and Ce(NO3), (molar mass = 326.13 g/mol) was dissolved in water. The solution was titrated with KIO, producing the precipitates La(IO,), and Ce(IO). For the complete titration of both La and Ce+, 42.25 mL of 0.1204 M KIO, was required. Calculate the mass fraction of La and Ce in the sample. mass fraction La: g La g sample mass fraction Ce: g Ce g sample
SECTION T O POSTLABORATORY ASSIGNMENT 1. A 1.500-g sample of potassium hydrogen carbonate is decomposed by me vield of K CO. 1.040 g of potassium carbonate. Calculate the theoretical yield and percent yield of 2 bonate is decomposed by heating to produce 2 KHCO3(s) 4 K CO3(s) + H2O(g) + CO2(B) 2. A 1.750-g sample containing potassium hydrogen carbonate is decomposed by heating. If the mass loss is 0.271 g, what is the percentage of KHCO3 in the unknown mixture?...
A 0.6689 g mixture of KCN (MW = 65.116 g/mol) and NaCN (MW = 49.005 g/mol) was dissolved in water. AgNO, was added to the solution, precipitating all of the CN in solution as AgCN (MW = 133.886 g/mol). The dried precipitate weighed 1.518 g. Calculate the weight percent of KCN and NaCN in the original sample. KCN wt% = NaCN wt% =
A 0.769 g mixture containing only sodium chloride and potassium chloride was dissolved in water. It required 36.7 mL of 0.327 M AgNO, to completely precipitate all of the chloride present. What is percent composition by mass of sodium chloride and potassium chloride in the mixture? mass percent NaCl : mass percent KCl :
A 0.733 g mixture containing only sodium chloride and potassium chloride was dissolved in water. It required 30.8 mL of 0.375 M AgNO, to completely precipitate all of the chloride present. What is percent composition by mass of sodium chloride and potassium chloride in the mixture? mass percent NaCl : mass percent KCl :
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