Get premium membership and access questions with answers, video lessons as well as revision papers.
1) use of Na(OH)
2) we first use filtration method to separate dust particles . We then cool the gases to -200°c .The gases are then passed through a mixture of Na(OH) to remove CO2 gas. Oxygen liquifies at -183 while Nitrogen at -196. The mixture is passed in a fractionating column. Liquid Nitrogen boil first and rises to the top of the solution and is piped off for storage while oxygen settles at the bottom
Rophina answered the question on April 11, 2018 at 09:59
- Explain how you would separate a mixture of nitrogen and oxygen given that their boiling points are -196^0c and 183^0c(Solved)
Explain how you would separate a mixture of nitrogen and oxygen given that their boiling points are -196^0c and 183^0c.
Date posted: April 10, 2018. Answers (1)
- Which reagents are used to test presence of sulphate ion?(Solved)
Which reagents are used to test presence of sulphate ion?
Date posted: April 7, 2018. Answers (1)
- Carbon and silicon belong to the same group of the periodic table yet carbon (4) oxide is a solid with a high melting point. Explain...(Solved)
Carbon and silicon belong to the same group of the periodic table yet carbon (4) oxide is a solid with a high melting point. Explain this difference
Date posted: April 6, 2018. Answers (1)
- State the law of thermodynamic spontaneity.(Solved)
State the law of thermodynamic spontaneity.
Date posted: April 4, 2018. Answers (1)
- Give the name of the following coordination compounds?
a)[CoBr(NH3)5]SO4
b)[Fe(NH3)6][Cr(CN)6]
c)[Co(SO4)(NH3)5]+
d)[Fe(OH)(H2O)5]2+
(Solved)
Give the name of the following coordination compounds?
a)[CoBr(NH3)5]SO4
b)[Fe(NH3)6][Cr(CN)6]
c)[Co(SO4)(NH3)5]+
d)[Fe(OH)(H2O)5]2+
Date posted: April 4, 2018. Answers (1)
- Give the molecular formulas of the following coordination compounds:
1.hexaammineiron(III) nitrate
2.ammonium tetrachlorocuprate(II)
3.sodium monochloropentacyanoferrate(III)
4.potassium hexafluorocobaltate(III)
(Solved)
Give the molecular formulas of the following coordination compounds:
1.hexaammineiron(III) nitrate
2.ammonium tetrachlorocuprate(II)
3.sodium monochloropentacyanoferrate(III)
4.potassium hexafluorocobaltate(III)
Date posted: April 4, 2018. Answers (1)
- Give the systematic names for the following coordination compounds
a)[Cr(NH3)3(H2O)3]Cl3
b)[Pt(NH3)5Cl]Br3
c)[Pt(H2NCH2CH2NH2)2Cl2]Cl2(Solved)
Give the systematic names for the following coordination compounds
a)[Cr(NH3)3(H2O)3]Cl3
b)[Pt(NH3)5Cl]Br3
c)[Pt(H2NCH2CH2NH2)2Cl2]Cl2
Date posted: April 4, 2018. Answers (1)
- Give the names of the following compounds as used in chemistry.
a)CH3COO-
b)H2NCH2CH2NH2
c)C5H5N.(Solved)
Give the names of the following compounds as used in chemistry.
a)CH3COO-
b)H2NCH2CH2NH2.
c)C5H5N.
Date posted: April 4, 2018. Answers (1)
- When 3.1g of a metal carbonate XC03 were heated to constant mass,2.0g of oxide of meta were formed. on reduction of this oxide ,1.6g of...(Solved)
When 3.1g of a metal carbonate XC03 were heated to constant mass,2.0g of oxide of meta were formed. on reduction of this oxide ,1.6g of metal remained .calculate the atomic number of X?
Date posted: April 2, 2018. Answers (1)
- Briefly describe the anatomy of an original lab sheet used in a chemistry laboratory report writing.(Solved)
Briefly describe the anatomy of an original lab sheet used in a chemistry laboratory report writing.
Date posted: March 29, 2018. Answers (1)
- What are transition metals?(Solved)
What are transition metals?
Date posted: March 27, 2018. Answers (1)
- The formula of the compound formed between a trivalent metal X and a divalent non metal Y is
(Solved)
The formula of the compound formed between a trivalent metal X and a divalent non metal Y is
Date posted: March 25, 2018. Answers (1)
- State the type of polymerization involved in the formation of perspex(Solved)
State the type of polymerization involved in the formation of perspex
Date posted: March 21, 2018. Answers (1)
- A certain fertilizer is suspected to be containing nitrate ions. Describe how the presence of nitrate ions can be determined in such fertilizer(Solved)
A certain fertilizer is suspected to be containing nitrate ions. Describe how the presence of nitrate ions can be determined in such fertilizer
Date posted: March 21, 2018. Answers (1)
- Outline 3 major soil chemistry reactions giving appropriate equations involved(Solved)
Outline 3 major soil chemistry reactions giving appropriate equations involved.
Date posted: March 19, 2018. Answers (1)
- Write the structural formula of ethane-1,2-diol(ethylene glycol) and explain why it is a good antifreeze(Solved)
Write the structural formula of ethane-1,2-diol(ethylene glycol) and explain why it is a good antifreeze.
Date posted: March 19, 2018. Answers (1)
- Define the following: (i) Hyperconjugation (ii) Participatory solvent (Solved)
Define the following:
i) Hyperconjugation
ii) Participatory solvent
Date posted: March 19, 2018. Answers (1)
- What will happen when anhydrous calcium chloride is exposed to air for some time?(Solved)
What will happen when anhydrous calcium chloride is exposed to air for some time?
Date posted: March 19, 2018. Answers (1)
- Describe the characteristics of chemical equilibrium(Solved)
Describe the characteristics of chemical equilibrium.
Date posted: March 14, 2018. Answers (1)
- Explain how pure nitrogen can be obtained from a mixture of nitrogen and oxygen.(Solved)
Deals with separation of mixtures under fractional distillation
Date posted: March 13, 2018. Answers (1)