Homework Answers
1) The net ionic reaction between MnO4- and Fe2+ is as follows:
5 Fe2+ + MnO4- + 8 H+ = 5 Fe3+ + Mn2+ + 4 H2O
2) In the above reaction the ratio between MnO4- and Fe2+ is 1 : 5
1 : 5 = 1.2*10-2 : x
x = 16.1 moles Fe2+ that can be oxidized by 1.2*10-2 moles of MnO4-.
3) a. Molarity of MnO4- is 0.024M. From this we can find the number of moles is 0.874 moles
b. Given amount of Fe2+ is 1.750 g and the molar mass of Fe2+ is 55.845 g.
The number moles required is given by ratio of given amount/molar mass .
So, the moles of Fe2+ is 0.0313 moles.
c. The sample contains 1.75 g of iron.
d. The percentage of iron present in sample is 0.175%
4) Percentage of iron present in Fe(NH4)2(SO4)2.6H2O is 14.32%
Add Answer to:
PRE-LAB ASSIGNMENT 1) Write the balanced net ionic equation for the reaction between MnO4-ion and Feation...
1. A solid sample containing some Fe2+ weighs 2.360 g. It required 36.44 mL 0.0244 M...
1. A solid sample containing some Fe2+ weighs 2.360 g. It required 36.44 mL 0.0244 M KMnO, to titrate the Fe- in the dissolved sample to a pink end point. The balanced redox reaction is shown below. 8 H + MnO4 + 5 Fe2+ + Mn2+ + 5 Fe3+ + 4H20 Calculate each of the following quantities. 2. (2 points) Calculate the percentage of Fe in pure iron(II) ammonium sulfate hexahydrate: (NH4)2[Fe(SO4)2]• 6 H20.
1. (4p) In an acidic aqueous solution, Fe2+ ions are oxidized to Fe3+ ions by MnO4": 5Fe2+(aq) + MnO4 (aq) + 8H(aq) → 5...
1. (4p) In an acidic aqueous solution, Fe2+ ions are oxidized to Fe3+ ions by MnO4": 5Fe2+(aq) + MnO4 (aq) + 8H(aq) → 5Fe3+ (aq) + Mn2(aq) + 4H2O(1) In part A of the experiment, suppose that 1.067 g of Fe(NH4)2(SO4)2.6H2O(s) are placed in a 250 ml Erlenmeyer flask to which 20 mL of water and 8 mL of 3 M H2SO4(aq) are added. The solution was titrated to the end point by adding 26.89 mL of KMnO4(aq) from the...
What is the Balanced Chemical Equation? The FAS confuses me. please explain no 4 permanganate Experiment...
What is the Balanced Chemical Equation? The FAS confuses me.
please explain
no 4 permanganate Experiment 30 Oxidation-Reduction Titration and Analysis of an Unknown Mixture PURPOSE OY BXPERIMENT: Standardizo a solution of Kno4, and determine the percent by mass of Na2C204 in an unknown mixture. The process of titration may be used for the standardization of solu- tions of oxidizing and/or reducing agents, provided a suitable method for observing the andpoint of the reaction is available. When potassium peran- ganata,...
Spring 2019 CSUSM CHEM 175 8. Which statements are true? Select ALL. that apply. a) Dissolution of ammonium nitrate is an endothermic reactio b) Hydrogen gas evolves when calcium carbonate reacts...
Spring 2019 CSUSM CHEM 175 8. Which statements are true? Select ALL. that apply. a) Dissolution of ammonium nitrate is an endothermic reactio b) Hydrogen gas evolves when calcium carbonate reacts with hydrochloric acid. c) The acid-base neutralization reaction is exothermic. ) The value of enthalpy change, AH, of calcium chloride dissolution is positive. sample contains an unknown amount of Fe?'which is titrated with a KMnO, solution in acidie tions to determine the iron composition by mass. A standardized KMnOs...
38. Referring to question 37, which reactant was the limiting reactant? In the reaction of iron(III)...
38. Referring to question 37, which reactant was the limiting reactant? In the reaction of iron(III) sulfate and barium hydroxide, Fe2(SO4)3 + 3 Ba(OH)2 ⟶ 3 BaSO4 + 2 Fe(OH)3 If 20.0 g of Fe2(SO4)3 is mixed with 20.0 g of Ba(OH)2 , Molar Masses: Fe2(SO4)3 = 399.91 Ba(OH)2 = 171.35 Fe(OH)3 = 106.88 37. How many grams of Fe(OH)3 will be produced if both iron(III) sulfate and barium hydroxide were used in the reaction? In the reaction of iron(III) sulfate and barium hydroxide, ...
Looking at the stoichiometry of the reaction (see the lab manual), how many moles KMnO4 must...
Looking at the stoichiometry of the reaction (see the lab manual), how many moles KMnO4 must have been delivered by the buret to react with that much Fe(NH4)2(SO4)2 · 6H2O? 8H+ + 5Fe+2 + MnO4- --> Mn+2 + 5Fe+3 + 4H2O (Remember that all Group I salts are soluble - including KMnO4. Therefore moles KMnO4 = moles MnO4-) 1.59×10−03 moles 5.92×10−04 moles 2.96×10−03 moles 5.03×10−04 moles Considering the moles and volume of KMnO4 above, what must the true molarity of...
If one of my chem students ran the reaction, as stated in problem below, and got...
If one of my chem students ran the reaction, as stated in problem below, and got 7.052 g of Ba(OH)2, what is the percent yield of the reaction? iron (III) sulfate and barium hydroxide, Fe2(SO4)3 + 3Ba(OH)2 --> 3BaSO4 + 2Fe(OH)3 If 20.0 g of Fe2(SO4)3 is mixed with 20.0 g of Ba(OH)2. Molar masses: Fe2(SO4)3 =399.91 Ba(OH)2= 171.35 Fe(OH)3 = 106.88 How many moles of Fe(OH)3 will be produced if all 20.0 g of Fe2(SO4)3 were consumed?
Name Classwork: Ch. 4 Chemical Reactions 1. Write the balanced ionic equation and net ijonic equation...
Name Classwork: Ch. 4 Chemical Reactions 1. Write the balanced ionic equation and net ijonic equation for the following molecular equation. 000H +bos be)os H + 8 2. Write the balanced molecular equation, ionie equation, and net ionic equation for the following reaction. Iron(III) sulfate is added to sodium sulfide to produce iron(II) sulfide and sodium sulfate. 3. Balance the following redox reaction, identify the oxidation states of each element, identify which elements are oxidized and which are reduced, write...
questions 35,36,37,38, and 39 all refer to the problem below In the reaction of iron (III)...
questions 35,36,37,38, and 39
all refer to the problem below
In the reaction of iron (III) sulfate and barium
hydroxide,
Fe2(SO4)3 + 3Ba(OH)2 -> 3BaSO4 + 2Fe(OH)3.
If 20.0 g of Fe2(SO4)3 is mixed with 20.0 g of Ba(OH)2.
Molar masses
Fe2(SO4)3 = 399.91
Ba(OH)2 = 171.35
Fe(OH)3 = 106.88
39. If one of the chem 10 students ran the reaction as stated in
problem 35 and got 7.052 g of Ba(OH)2, what is the percentage yield
for the reaction...
5. Let a square represent an ammonium ion and a circle represent a sulfate ion. Which...
5. Let a square represent an ammonium ion and a circle represent a sulfate ion. Which of the following depicts a small representative volume of a 0.10 M aqueous solution of ammonium sulfate? Water molecules have not been included. For each incorrect answer, state why it is incorrect; be as specific as possible. A в C о ‑ G F None of B these O ODO epresents an ato At 25°C in a 50 mL Erlenmeyer flask were combined 1.050...
1. A solid sample containing some Fe2+ weighs 2.360 g. It required 36.44 mL 0.0244 M KMnO, to titrate the Fe- in the dissolved sample to a pink end point. The balanced redox reaction is shown below. 8 H + MnO4 + 5 Fe2+ + Mn2+ + 5 Fe3+ + 4H20 Calculate each of the following quantities. 2. (2 points) Calculate the percentage of Fe in pure iron(II) ammonium sulfate hexahydrate: (NH4)2[Fe(SO4)2]• 6 H20.
1. (4p) In an acidic aqueous solution, Fe2+ ions are oxidized to Fe3+ ions by MnO4": 5Fe2+(aq) + MnO4 (aq) + 8H(aq) → 5Fe3+ (aq) + Mn2(aq) + 4H2O(1) In part A of the experiment, suppose that 1.067 g of Fe(NH4)2(SO4)2.6H2O(s) are placed in a 250 ml Erlenmeyer flask to which 20 mL of water and 8 mL of 3 M H2SO4(aq) are added. The solution was titrated to the end point by adding 26.89 mL of KMnO4(aq) from the...
What is the Balanced Chemical Equation? The FAS confuses me.
please explain
no 4 permanganate Experiment 30 Oxidation-Reduction Titration and Analysis of an Unknown Mixture PURPOSE OY BXPERIMENT: Standardizo a solution of Kno4, and determine the percent by mass of Na2C204 in an unknown mixture. The process of titration may be used for the standardization of solu- tions of oxidizing and/or reducing agents, provided a suitable method for observing the andpoint of the reaction is available. When potassium peran- ganata,...
Spring 2019 CSUSM CHEM 175 8. Which statements are true? Select ALL. that apply. a) Dissolution of ammonium nitrate is an endothermic reactio b) Hydrogen gas evolves when calcium carbonate reacts with hydrochloric acid. c) The acid-base neutralization reaction is exothermic. ) The value of enthalpy change, AH, of calcium chloride dissolution is positive. sample contains an unknown amount of Fe?'which is titrated with a KMnO, solution in acidie tions to determine the iron composition by mass. A standardized KMnOs...
Name Classwork: Ch. 4 Chemical Reactions 1. Write the balanced ionic equation and net ijonic equation for the following molecular equation. 000H +bos be)os H + 8 2. Write the balanced molecular equation, ionie equation, and net ionic equation for the following reaction. Iron(III) sulfate is added to sodium sulfide to produce iron(II) sulfide and sodium sulfate. 3. Balance the following redox reaction, identify the oxidation states of each element, identify which elements are oxidized and which are reduced, write...
questions 35,36,37,38, and 39
all refer to the problem below
In the reaction of iron (III) sulfate and barium
hydroxide,
Fe2(SO4)3 + 3Ba(OH)2 -> 3BaSO4 + 2Fe(OH)3.
If 20.0 g of Fe2(SO4)3 is mixed with 20.0 g of Ba(OH)2.
Molar masses
Fe2(SO4)3 = 399.91
Ba(OH)2 = 171.35
Fe(OH)3 = 106.88
39. If one of the chem 10 students ran the reaction as stated in
problem 35 and got 7.052 g of Ba(OH)2, what is the percentage yield
for the reaction...
5. Let a square represent an ammonium ion and a circle represent a sulfate ion. Which of the following depicts a small representative volume of a 0.10 M aqueous solution of ammonium sulfate? Water molecules have not been included. For each incorrect answer, state why it is incorrect; be as specific as possible. A в C о ‑ G F None of B these O ODO epresents an ato At 25°C in a 50 mL Erlenmeyer flask were combined 1.050...
Most questions answered within 3 hours.
-
Consider the competitive environment of Starbuck's, Progressive
Insurance, a manufacturing firm with low turnover, or a...
asked 2 minutes ago -
3. Gains from trade
Consider two neighbouring island countries called Euphoria and
Contente. They each have...
asked 1 hour ago -
A business executive has the option to invest money in two
plans: Plan A guarantees that...
asked 4 hours ago -
Hello, can someone please help me answer this question?
How much heat is absorbed by a...
asked 4 hours ago -
. A marketing researcher conducted a survey of 25 shoppers
randomly selected at the local mall...
asked 4 hours ago -
Create an comprehensive response to the
following:
Antimicrobial agents work on a multitude of microbes (bacteria,...
asked 4 hours ago -
6.13 LAB: Step counter. Section 6.3.
A pedometer treats walking 2,000 steps as walking 1 mile....
asked 4 hours ago -
(14.2) A block of mass m = 10 kg riding on a frictionless
horizontal plane is...
asked 4 hours ago -
Use any search engine to search for articles about Starbucks
partnership with Tata Companies in India...
asked 4 hours ago -
Let’s say that for some reason Bank Excess Reserves suddenly
increase sharply. What effect would this...
asked 4 hours ago -
Given:
Curent Assets: $600,000
Total Assets: $2,600,000
Current Liabilities: $500,000
Total Liabilities: $1,700,000
What is the...
asked 4 hours ago -
1. What is a “Bankster”? What is insider trading? Why is it
illegal?
2. What is...
asked 4 hours ago