Physics, Chemistry and Biology: Post your doubts here!

[Mr.Physics]

thnks

... i know but in 2013 past papers there r some detailed questions about it... which are not mentioned in cambridge books... anyways thanks

Yes but the main focus of those questions is to test your knowledge of polymerisation

 

[misscute406]

So every1 has different opinions ..
R u sure

only the concentration differs!! The acidity level is the same na!! it will disossiate the same number of H+ ions....
dude i'm not sure though!! just check it out!!

 

[Saad the Paki]

only the concentration differs!! The acidity level is the same na!! it will disossiate the same number of H+ ions....
dude i'm not sure though!! just check it out!!

see the pic i posted
My book says something else

 

[themightygiraffe]

i just wanna make sure that only metals below hydrogen in the reactivity series don't react with acids
right ?

 

[NOneed2speedd]

i just wanna make sure that only metals below hydrogen in the reactivity series don't react with acids
right ?

Yes right

 

[themightygiraffe]

thanks and also how is copper sulfate formed from sulfuric acid ?

 

[NOneed2speedd]

thanks and also how is copper sulfate formed from sulfuric acid ?

Copper only reacts with hot concentrated sulphuric acid in a redox reaction

 

[DANISH182]

guys how to draw a full structure for butyl etanoate

 

[themightygiraffe]

Copper only reacts with hot concentrated sulphuric acid in a redox reaction

thanks alot

 

[NOneed2speedd]

guys how to draw a full structure for butyl etanoate

 

[Mr.Physics]

guys how to draw a full structure for butyl etanoate

Butyl ethanoate is formed by reacting butanol with ethanoic acid.
Butanol + Ethanoic acid -------> Butyl ethanoate + water
C4H9OH + CH3COOH ---------> CH3COOC4H9 + H20

So the structure would be CH3-COO-CH2-CH2-CH2-CH3

 

[Mr.Physics]

guys how to draw a full structure for butyl etanoate

If the question asks you to show individual bonds then draw a displayed formula like this

 

[Shandana khan]

Guys plzz help n explain the following physics questions...I ll be very thankful...
3 (c) and 9 (b)

 

[DANISH182]

thnx but i asked about the structure

 

[DANISH182]

Butyl ethanoate is formed by reacting butanol with ethanoic acid.
Butanol + Ethanoic acid -------> Butyl ethanoate + water
C4H9OH + CH3COOH ---------> CH3COOC4H9 + H20

So the structure would be CH3-COO-CH2-CH2-CH2-CH3

can u draw and show it to me

 

[NOneed2speedd]

thnx but i asked about the structure

I have attached. . Scroll up
C4 h9 structure u can draw urself.. no?

 

[Mr.Physics]

9 b only

Omg your handwriting is amazing !!

 

[shingiechingz@8]

how do we describe
1. the formation of ethanoic acid using acidified KMnO4 (3)
2.the usefulness of chromatography in separating and identifying mixtures(4)

 

[NOneed2speedd]

Zinc+butanoic acid will give zinc butanoate + water or hydrogen?

 

[shingiechingz@8]

Zinc+butanoic acid will give zinc butanoate + water or hydrogen?

I think its Zinc butanoate + hydrogen