Chemistry: Post your doubts here!

[knowitall10]

ummm really?? bcz our sir made us write it down... drat if we don't need it btw

No... u don't need to know it... he probably made u draw it to explain u or something. I mean, i did AS Chem two times, i ddnt come across this at all

 

[MustafaMotani]

okay question: - give me the formula of Tollen's reagent
it is [Al(NH3)2]+ ??

yeah its ryt..
its Ag(NH3)2OH

 

[daredevil]

plz someone give me a reaction of carboxylic acid with carbonates
syed1995

 

[knowitall10]

I kind of like Bio. It's a cool subject, interesting and all, but terribly long.

I love biology... i relate almost everything to bio... sometimes, i even tend to describe a place the way the cytoplasm is in the palisade mesophyll
I hate Chemistry though... i like to discuss it, but its something i will never be able to do myself

 

[daredevil]

yeah its ryt..
its Ag(NH3)2OH

thanks Mustafa was just having some confusions

 

[MustafaMotani]

thanks Mustafa was just having some confusions

anytime

 

[syed1995]

plz someone give me a reaction of carboxylic acid with carbonates
syed1995

HCOOH + NaCO3 --> HCOONa + CO2 + H2O

 

[daredevil]

In esterification we have to heat with reflux and use H2SO4 as a reagent right?? syed1995 and MustafaMotani

 

[Jinkglex]

plz someone give me a reaction of carboxylic acid with carbonates
syed1995

CH3COOH + NA2CO3 -> CH3COO-Na+ + CO2 + H2O. And now im going to be moving to the AS thread or making an A2 thread for the next paper. Goodnight and good luck to you all, please do remember me in your prayers!

 

[daredevil]

HCOOH + NaCO3 --> HCOONa + CO2 + H2O

soorry to burst ur bubble friend but its Na2CO3

 

[strangerss]

hey every one , all salam alaykum. I have a question what would be produced if a carbon in an alkene involved in the double bon was also bonded to a hydrogen AND a bromine or any halogen and then it was treated with cold dilute manganate ion AND hot concentrated manganate ions ?? Would such a thing be tested in exams 0.o?

 

[syed1995]

Cl2 + 2NaOH --> NaCl + NaClO + H2O

3Cl2 + 6NaOH --> NaCl + NaClO3 + 3 H2O

right?

 

[daredevil]

CH3COOH + NA2CO3 -> CH3COO-Na+ + CO2 + H2O. And now im going to be moving to the AS thread or making an A2 thread for the next paper. Goodnight and good luck to you all, please do remember me in your prayers!

its not balanced :O

 

[syed1995]

soorry to burst ur bubble friend but its Na2CO3

haha i wrote in a hurry my bad

 

[MustafaMotani]

In esterification we have to heat with reflux and use H2SO4 as a reagent right?? syed1995 and MustafaMotani

I think H+ ion is just a condition for esterification rather than reagent ... however am not sure in Chem as much I m in maths

 

[syed1995]

its not balanced :O

exactly the reason why i might have made it Na..

 

[daredevil]

Cl2 + 2NaOH --> NaCl + NaClO + H2O

3Cl2 + 6NaOH --> NaCl + NaClO3 + 3 H2O

right?

check ur 2nd equations there are too many Cl in the reactants

 

[Soldier313]

Here's the diagram:
I didn't check the mark scheme though....
I'll do it now..

Thanx a bunch for this man!
JazakAllah khair

PS: That's pretty neat ^_^

PPS: Oh and you've placed the ammonium ntrate just like that on the tube, i think it needs a porcelain dish

 

[PANDA-]

plz someone give me a reaction of carboxylic acid with carbonates
syed1995

RCOOH + XCO3 ---> CO2 + H2O + salt
e.g. 2CH3COOH + CaCO3 ---> (CH3COO)2Ca+ H2O + CO2

I got it off google
I don't think you need to know the equation. In the papers I answered some papers, according to that what I know is that you need to know that CO2 is given out (effervesence) and this CO2 turns limewater milky.

 

[syed1995]

In esterification we have to heat with reflux and use H2SO4 as a reagent right?? syed1995 and MustafaMotani

Esterification is a reaction between an Alcohol and an Acid.. with a mineral acid as catalyst...
the reverse process is a ester reaction with water .. with again a mineral acid (dilute) as catalyst..