Lets Get Started

[asadalam]

what dont u get in 12?

Leave 12,i got it tell about 11

 

[exploded diper]

Leave 12,i got it tell about 11

if i knew how to do it i would have told you already

 

[exploded diper]

Leave 12,i got it tell about 11

form two half equations
Sn2+ --> Sn4+ + 2e- (multiply by 5)
8H+ + MnO4^- + 5e- --> Mn2+ + 4H2O (multiply by 2)
16H+ + 5Sn2+ + 2MnO4^- --> 5Sn4+ + 2Mn2+ + 8H2O
5 moles Sn +2 -----> 2 moles mn+2
moles of mn= 9.5x 2 / 190 x 5 =0.02 moles

 

[exploded diper]

the answer is D. but isnt naoh a reducing agent?

 

[The Chill Master]

View attachment 51117

the answer is D. but isnt naoh a reducing agent?

NaOH and I2 are mild oxidizing agents. You can see that in Iodoform test.

 

[exploded diper]

NaOH and I2 are mild oxidizing agents. You can see that in Iodoform test.

but isnt concentrate sulphuric acid also an oxidizing agent.. or does hat have something to do wit rom temperature.

 

[The Chill Master]

but isnt concentrate sulphuric acid also an oxidizing agent.. or does hat have something to do wit rom temperature.

Conc. H2So4 is a reducing agent it reduces alcohols to Alkens or ether.

 

[exploded diper]

Conc. H2So4 is a reducing agent it reduces alcohols to Alkens or ether.

are u sure ? i thought it was an oxidizing agent .

 

[The Chill Master]

are u sure ? i thought it was an oxidizing agent .

ya as far as i think

 

[The Chill Master]

are u sure ? i thought it was an oxidizing agent .

my bad u were right it's an oxidising agent

 

[exploded diper]

my bad u were right it's an oxidising agent

cool so now we are both stuck

 

[The Chill Master]

cool so now we are both stuck

http://www.chm.bris.ac.uk/motm/h2so4/h2so4h.htm
Edit:just search for room temperature

 

[The Chill Master]

http://www.chm.bris.ac.uk/motm/h2so4/h2so4h.htm
Edit:just search for room temperature

We will get HCL with this.

 

[asadalam]

View attachment 51117

the answer is D. but isnt naoh a reducing agent?

This has nothing to do with reducing or oxidising,its a reaction we have to memorize,hot conc naoh gives

Nacl + NaClO3

while cold dilute gives

NaCl + NaClO

As you can see in NaClO3 Cl has an oxidation state of +5

 

[exploded diper]

This has nothing to do with reducing or oxidising,its a reaction we have to memorize,hot conc naoh gives

Nacl + NaClO3

while cold dilute gives

NaCl + NaClO

As you can see in NaClO3 Cl has an oxidation state of +5

cool...is this before organic chemistry or after...(meaning before periodicity )

 

[exploded diper]

Q16
http://papers.xtremepapers.com/CIE/...d AS Level/Chemistry (9701)/9701_s07_qp_1.pdf

explain

 

[asadalam]

cool...is this before organic chemistry or after...(meaning before periodicity )

Its before organic,in the group 7 chapter

 

[exploded diper]

cool

Its before organic,in the group 7 chapter

 

[The Chill Master]

Can anyone help me out?
I seriously need some guidance for As Physics(though i am not giving AS)
I just got to know my Prelims marks they aren't up to the mark,in recommendations i got an A but this time I am gonna end up with something really bad.Any tips and suggestions

 

[MarcoReus]

Can anyone help me out?
I seriously need some guidance for As Physics(though i am not giving AS)
I just got to know my Prelims marks they aren't up to the mark,in recommendations i got an A but this time I am gonna end up with something really bad.Any tips and suggestions

You need guidance in what? Is there a weak topic(s) or do you just struggle with entire AS?