Homework Help is Here – Start Your Trial Now!
Science
Chemistry
8. Magnesium oxide is not very soluble in water, and is dif tult to titrate directly. I ts purity can be det ermined by use of a 'back titration'method. A 4.06 g sample of impure magnesium oxide was completely dissolved in 100 cm³ of hydrochl oric acid, of concentration 2.0 mol dm (in excess). The excess acid required 1 9.7 cm³ of sodium hydroxide (0.20 mol dm) for neutralization. This second ti tration is called a 'back titration', and is used to determine the unreacted acid. Calculate the mass of magnesium oxide that reacted with the initial hydrochlo ric acid, hence the % purity of the magnesium oxide.

8. Magnesium oxide is not very soluble in water, and is dif tult to titrate directly. I ts purity can be det ermined by use of a 'back titration'method. A 4.06 g sample of impure magnesium oxide was completely dissolved in 100 cm³ of hydrochl oric acid, of concentration 2.0 mol dm (in excess). The excess acid required 1 9.7 cm³ of sodium hydroxide (0.20 mol dm) for neutralization. This second ti tration is called a 'back titration', and is used to determine the unreacted acid. Calculate the mass of magnesium oxide that reacted with the initial hydrochlo ric acid, hence the % purity of the magnesium oxide.

General Chemistry - Standalone book (MindTap Course List)
General Chemistry - Standalone book (MindTap Course List)
11th Edition
ISBN:9781305580343
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Chapter6: Thermochemisty
Section: Chapter Questions
Problem 6.159QP: The carbon dioxide exhaled in the breath of astronauts is often removed from the spacecraft by...
See similar textbooks
icon
Related questions
Question
Help me with question 8 and the step to follow
11:32 am ( More CHM101 ASSIG... hown in the following balanced equation: NH, (ag) + HNO,(ag) - NH, N0, (ag) In an experiment, 404.2 g of ammonium nitrate is produced when 112.5 g of amm onia and excess nitric acid are combined. Determine the percent yield of the produ ct. 7. An iron supplement is used to treat anaemia and 50 mg of Fe2+ is required per tablet. If the iron compound used in the tablet is Feso4.7H20, what mass of thi s compound would be required per tablet to provide the desired amount of Fe2 +? 8. Magnesium oxide is not very soluble in water, and is dif tult to titrate directly. I ts purity can be determined by use of a 'back titration'method. A 4.06 g sample of impure magnesium oxide was completely dissolved in 100 cm3 of hydrochl oric acid, of concentration 2.0 mol dm3 (in excess). The excess acid required 1 9.7 cm3 of sodium hydroxide (0.20 mol dm3) for neutralization. This second ti tration is called a 'back titration', and is used to determine the unreacted acid. magnesium oxide that reacted with the initial hydrochlo Calculate the mass ric acid, hence the % purity of the magnesium oxide. The reaction equations are: M90 (s) + HCI (ag)- MgC, (aq) + H,O) NaOH (ag) + HCI (ag) - NaCI (ng) + HO0) 9. Assign the oxidation numbers of each element given bold in the following che mical species: HCI, NH3, NO3- , K2Cr207, Hg2Cl2, HgCl2 Al(OH)3, NazPO4 10. Aniline, a starting material for urethane plastic foams, consists of C, H, and N. Combustion of such compounds yields CO2, H20, and N2 as products. If the co mbustion of 9.71 g of aniline yields 6.63 g H,0 and 1.46 g N,, determine the e mpirical formula of aniline and the molecular formula, if the molar mass of an iline is 93 g/mol. 11.Calculate the percentage of Cl in Al(CIO,)3- 12.A 60kg woman has 1.13kg of heamoglobin (64,456 g/mol) in her blood. How many molecules of heamoglobin are in her blood? 13.A solution of Na,CO3 (105.99 g/mol) is obtained by dissolving 0.10599 g of N a,CO, into in a 1000.00 mL volumetric flask. 2|Pagel Q Edit Fit screen Search Save as
Transcribed Image Text:11:32 am ( More CHM101 ASSIG... hown in the following balanced equation: NH, (ag) + HNO,(ag) - NH, N0, (ag) In an experiment, 404.2 g of ammonium nitrate is produced when 112.5 g of amm onia and excess nitric acid are combined. Determine the percent yield of the produ ct. 7. An iron supplement is used to treat anaemia and 50 mg of Fe2+ is required per tablet. If the iron compound used in the tablet is Feso4.7H20, what mass of thi s compound would be required per tablet to provide the desired amount of Fe2 +? 8. Magnesium oxide is not very soluble in water, and is dif tult to titrate directly. I ts purity can be determined by use of a 'back titration'method. A 4.06 g sample of impure magnesium oxide was completely dissolved in 100 cm3 of hydrochl oric acid, of concentration 2.0 mol dm3 (in excess). The excess acid required 1 9.7 cm3 of sodium hydroxide (0.20 mol dm3) for neutralization. This second ti tration is called a 'back titration', and is used to determine the unreacted acid. magnesium oxide that reacted with the initial hydrochlo Calculate the mass ric acid, hence the % purity of the magnesium oxide. The reaction equations are: M90 (s) + HCI (ag)- MgC, (aq) + H,O) NaOH (ag) + HCI (ag) - NaCI (ng) + HO0) 9. Assign the oxidation numbers of each element given bold in the following che mical species: HCI, NH3, NO3- , K2Cr207, Hg2Cl2, HgCl2 Al(OH)3, NazPO4 10. Aniline, a starting material for urethane plastic foams, consists of C, H, and N. Combustion of such compounds yields CO2, H20, and N2 as products. If the co mbustion of 9.71 g of aniline yields 6.63 g H,0 and 1.46 g N,, determine the e mpirical formula of aniline and the molecular formula, if the molar mass of an iline is 93 g/mol. 11.Calculate the percentage of Cl in Al(CIO,)3- 12.A 60kg woman has 1.13kg of heamoglobin (64,456 g/mol) in her blood. How many molecules of heamoglobin are in her blood? 13.A solution of Na,CO3 (105.99 g/mol) is obtained by dissolving 0.10599 g of N a,CO, into in a 1000.00 mL volumetric flask. 2|Pagel Q Edit Fit screen Search Save as
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Environmental Pollution
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
General Chemistry - Standalone book (MindTap Cour…
General Chemistry - Standalone book (MindTap Cour…
Chemistry
ISBN:
9781305580343
Author:
Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:
Cengage Learning
World of Chemistry, 3rd edition
World of Chemistry, 3rd edition
Chemistry
ISBN:
9781133109655
Author:
Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste
Publisher:
Brooks / Cole / Cengage Learning
Chemistry & Chemical Reactivity
Chemistry & Chemical Reactivity
Chemistry
ISBN:
9781133949640
Author:
John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:
Cengage Learning
Chemistry & Chemical Reactivity
Chemistry & Chemical Reactivity
Chemistry
ISBN:
9781337399074
Author:
John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:
Cengage Learning
Chemistry: Principles and Practice
Chemistry: Principles and Practice
Chemistry
ISBN:
9780534420123
Author:
Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:
Cengage Learning
Introduction to General, Organic and Biochemistry
Introduction to General, Organic and Biochemistry
Chemistry
ISBN:
9781285869759
Author:
Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Publisher:
Cengage Learning
SEE MORE TEXTBOOKS