- Messages
- 271
- Reaction score
- 429
- Points
- 73
SiO2Um for silicon chlorides reaction with water, do we write Si(OH)4 as the product, or SiO2,?
We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
Click here to Donate Now (View Announcement)
SiO2Um for silicon chlorides reaction with water, do we write Si(OH)4 as the product, or SiO2,?
This stuff isn't in the syllabus or taught. This is precisely why it has shown you the 4 figures above the actual question. The examiner wants you to analyze those figures, see whats going on, and apply THAT to the question.
The question shows that all carbons in Benzene can be made to lie on the same plane, but not in cyclohexane. The question also shows that butane Carbons can be made to lie on the same plane, but methylpropane, also an alkane, cannot.
This tells us that if a compound has a ring, OR branching, it cannot be made to lie on the same plane.
All of them are co-planer apart from B.
C is coplaner because you don't have to consider the Oxygen atoms. The others are unbranched and two individual chains lying on the same plane.
I think it goes like this:Can anyone please explain to me how to chose the element which forms a oxiding agent or a reducing agent when reacted with water, when the question gives part of the periodic table and asks this question?
The reaction goes like this:Um for silicon chlorides reaction with water, do we write Si(OH)4 as the product, or SiO2,?
Everything, my dear Watson, has a logical explanation.
c)
S into T is hydration so I'd use steam + phosphoric acid catalyst @ 300C
S into U is di-ol so Cold Dilute Acidified KMnO4 in a heartbeat.
T into S is dehydration so I'd use conc H2SO4 @ 180C [Can also use H3PO4 @ 300C but that's not recommended]
T with Na (excess).
Replace all the OH's with O-+Na
NaOOCCH(ONA)CH2COONa
U with Na2CO3 (excess)
Replace the carboxylic OH's with O-+Na but not the alcohol OH's.
NaOOCCH(OH)CH(OH)COONa
Add the +'s and -'s on top. Was making it look all weird in typed format since I can't superscript it here.
e)
It's merely asking for cis trans isomers.
cis will be both COOH's on the same side of the two carbons and trans will be diagnol/opposite sides of the two carbons. If this doesn't make sense let me know and I'll draw it out for you.
Where?http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s13_qp_22.pdf
q 4 (d) why is it ethanoic acid?
Oops I meant 5 (d)Where?
I'm not exactly sure.Oops I meant 5 (d)
I will follow through the question from beginning to let you know how examiner give you hints.http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s13_qp_22.pdf
q 5 (d) why is it ethanoic acid?
pattern:
-(information)
the deduction we can make from information
really?I suck at organic :/
3di) how in ms they got Ba as 81.1 ? :/
Whole question 4 and 5 :/
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s11_qp_22.pdf
ZaqZainab
:''( I just start chem few days backreally?
100-18.9=81.1
even i suck at organicI suck at organic :/
3di) how in ms they got Ba as 81.1 ? :/
Whole question 4 and 5 :/
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s11_qp_22.pdf
ZaqZainab
Explain in detail plz, Idk anything in this quest. :'(even i suck at organic
Question 4 ?it isn't aren't organic the ms says it all perfectly what the confusion?
wait i will upload a pic for 5
For almost 10 years, the site XtremePapers has been trying very hard to serve its users.
However, we are now struggling to cover its operational costs due to unforeseen circumstances. If we helped you in any way, kindly contribute and be the part of this effort. No act of kindness, no matter how small, is ever wasted.
Click here to Donate Now