KCl and KBr are both ionic solids. A mixture of KCl and KBr has a mass...
KCl and KBr are both ionic solids. A mixture of KCl and KBr has a mass of 3.595 g. When this mixture is heated in the presence of excess Cl2, all of the KBr is converted to KCl. If the total mass of KCl present after this reaction is 3.129 g, what percentage (by mass) of the original mixture was KBr? (HINT: Be sure that you understand why the mass of the sample has decreased. It may help if you write an equation for the reaction that converted the KBr to KCl.)
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Answer :-
This question is solved by using the simple concept of stoichiometry and a chemical equation is written then mass is calculated.
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KCl and KBr are both ionic solids. A mixture of KCl and KBr has
a mass...
A mixture containing KClO3, K2CO3, KHCO3, and KCl was heated, producing CO2,O2, and H2O gases according...
A mixture containing KClO3, K2CO3, KHCO3, and KCl was heated, producing CO2,O2, and H2O gases according to the following equations: 2KClO3(s)2KHCO3(s)K2CO3(s)→→→2KCl(s)+3O2(g)K2O(s)+H2O(g)+2CO2(g)K2O(s)+CO2(g) The KCl does not react under the conditions of the reaction. 100.0 g of the mixture produces 1.70 g of H2O, 12.66 g of CO2, and 4.00 g of O2. (Assume complete decomposition of the mixture.) You may want to reference (Page) Section 3.7 while completing this problem. a. How many grams of KClO3 were in the original mixture?...
SEPARATION OF A MIXTURE OF SOLIDS 4. Define the terms "sublimation" and "decantation." 5. Consider that...
SEPARATION OF A MIXTURE OF SOLIDS 4. Define the terms "sublimation" and "decantation." 5. Consider that you started with a 3.506 g sample of a mixture containing NH,CI, NaCI, and Sio, and sublimed away 0.750 g of NH·CL when you removed all of Naci by dissolving in water, 1.284 g of SiO2 was present in the evaporating dish. What was the mass percentage of NaCl in the mixture? Show all work.
Complete and balance the following equation. Then, write the total and the net ionic equation for...
Complete and balance the following equation. Then, write the total and the net ionic equation for the reaction. Be sure to include all phases and charges! (4 points) 1. Net Ionic Equation: a) How many grams of chlorine gas can be prepared from the reaction of 16.0 g of manganese(IV) oxide and 30.0 g of hydrogen chloride according to the following chemical equation? (8 points) 2. MnO2 + 4HC1 ? MnCl2+ Cl2 + 2H2O b) What is the mass of...
A mixture of C2H2 and CH4 has a total mass of 234.1 g. When this mixture...
A mixture of C2H2 and CH4 has a total mass of 234.1 g. When this mixture reacts completely with excess oxygen, the CO2 and H2O products have a combined mass of 1009.8 g. What mass of C2H2 was present in the initial mixture?
Elemental phosphorus reacts with chlorine gas according to the equation P4(s)+6Cl2(g)→4PCl3(l) A reaction mixture initially contains...
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A 5.37 g mixture of sodium chloride and sodium carbonate is heated to decompose the sodium...
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eRification of a Compound by Mass Relationships 1. A student attempts to identify an unknown compound...
eRification of a Compound by Mass Relationships 1. A student attempts to identify an unknown compound by the method used in this expeni- ment. She finds that when she heated a sample weighing 0.5015 g the mass went down appreciably, to 0.3432 g. When the product was converted to a chloride, the mass went up, to 0.3726 g. a. Is the sample a carbonate? Give your reasoning. b. What are the two compounds that might be in the unknown? and...
How do you calculate questions 1 - 8 for the data analysis section? A. Precipitation of CaC,O, H,O from the Salt...
How do you calculate questions 1 - 8 for the data analysis
section?
A. Precipitation of CaC,O, H,O from the Salt Mixture Unknown number Trial 1 Trial 2 1. Mass of beaker (g) 59.45 59.45 5.oS Mass of beaker and salt mixture (g) 2. 3. Mass of salt mixture (g) I, oo oS 4. Mass of filter paper (g 5. Mass of filter paper and product after air-dried or oven-dried (g) 0, 35 6. Mass of dried product (g) 7....
9. What is the hydroxide-ion concentration in a solution formed by combining 200 mL of 0.16 M HCl with 300. mL of 0...
9. What is the hydroxide-ion concentration in a solution formed by combining 200 mL of 0.16 M HCl with 300. mL of 0.091 M NaOH at 25°C? HCl(aq) + NaOH(aq) + NaCl(aq) + H2O(1) 10. What is the pH of a solution prepared by dissolving 0.241 L of HCl(g), measured at STP, in enough water such that the total volume of the solution is 2.00 L? (R = 0.0821 L.atm/(K.mol)) (Use gas law equation to calculate Mole of HCl dissolved...
1. Some solids can be converted directly to the vapor phase by heating. The process is...
1. Some solids can be converted directly to the vapor phase by heating. The process is called: a) Fusion b) sublimation c) vaporization d) condensation e) distillation 2. Which one of the following substances is INCORRECTLY matched with the kind of solid it forms? Substance Kind of Solid a) Sulfur dioxide molecular b) Graphite covalent c) Calcium bromide ionic d) Lithium ionic e) Methane molecular 3. Arrange the following in order of increasing melting points: KCl, He, H2O, HF. a)...
SEPARATION OF A MIXTURE OF SOLIDS 4. Define the terms "sublimation" and "decantation." 5. Consider that you started with a 3.506 g sample of a mixture containing NH,CI, NaCI, and Sio, and sublimed away 0.750 g of NH·CL when you removed all of Naci by dissolving in water, 1.284 g of SiO2 was present in the evaporating dish. What was the mass percentage of NaCl in the mixture? Show all work.
Complete and balance the following equation. Then, write the total and the net ionic equation for the reaction. Be sure to include all phases and charges! (4 points) 1. Net Ionic Equation: a) How many grams of chlorine gas can be prepared from the reaction of 16.0 g of manganese(IV) oxide and 30.0 g of hydrogen chloride according to the following chemical equation? (8 points) 2. MnO2 + 4HC1 ? MnCl2+ Cl2 + 2H2O b) What is the mass of...
eRification of a Compound by Mass Relationships 1. A student attempts to identify an unknown compound by the method used in this expeni- ment. She finds that when she heated a sample weighing 0.5015 g the mass went down appreciably, to 0.3432 g. When the product was converted to a chloride, the mass went up, to 0.3726 g. a. Is the sample a carbonate? Give your reasoning. b. What are the two compounds that might be in the unknown? and...
How do you calculate questions 1 - 8 for the data analysis
section?
A. Precipitation of CaC,O, H,O from the Salt Mixture Unknown number Trial 1 Trial 2 1. Mass of beaker (g) 59.45 59.45 5.oS Mass of beaker and salt mixture (g) 2. 3. Mass of salt mixture (g) I, oo oS 4. Mass of filter paper (g 5. Mass of filter paper and product after air-dried or oven-dried (g) 0, 35 6. Mass of dried product (g) 7....
9. What is the hydroxide-ion concentration in a solution formed by combining 200 mL of 0.16 M HCl with 300. mL of 0.091 M NaOH at 25°C? HCl(aq) + NaOH(aq) + NaCl(aq) + H2O(1) 10. What is the pH of a solution prepared by dissolving 0.241 L of HCl(g), measured at STP, in enough water such that the total volume of the solution is 2.00 L? (R = 0.0821 L.atm/(K.mol)) (Use gas law equation to calculate Mole of HCl dissolved...
1. Some solids can be converted directly to the vapor phase by heating. The process is called: a) Fusion b) sublimation c) vaporization d) condensation e) distillation 2. Which one of the following substances is INCORRECTLY matched with the kind of solid it forms? Substance Kind of Solid a) Sulfur dioxide molecular b) Graphite covalent c) Calcium bromide ionic d) Lithium ionic e) Methane molecular 3. Arrange the following in order of increasing melting points: KCl, He, H2O, HF. a)...
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