Biology; Chemistry; Physics: Post your doubts here!

[ciesgetoveralready]

What is the difference between branched and unbranched structure of an alkene? for example butene in this case. Can somebody please explain and show me the drawn ones? thanks a lot

 

[Tuba noor]

Q4.

moles of NaOH = 25/1000*0.10 =0.0025
moles of H2SO4 required = 0.0025/2 = 0.00125
amount of H2SO4 in option (a) = 25/1000*0.05 = 0.00125

 

[Tuba noor]

What is the difference between branched and unbranched structure of an alkene? for example butene in this case. Can somebody please explain and show me the drawn ones? thanks a lot

in alkenes there is no branched structure upto 3 carbon atoms.

 

[Tuba noor]

What is the difference between branched and unbranched structure of an alkene? for example butene in this case. Can somebody please explain and show me the drawn ones? thanks a lot

this is 4 carbon branched structure of alkene

 

[ciesgetoveralready]

View attachment 42084
this is 4 carbon branched structure of alkene

Thank you!

 

[Tuba noor]

Thank you!

your always welcome

 

[princess Anu]

Q The Apparatus used to pour a liquid into a container with narrow neck. why isnt it burette?

 

[Awesome12]

Q The Apparatus used to pour a liquid into a container with narrow neck. why isnt it burette?

You normally use a funnel as it ensures all the liquid goes in to the container. Using a burette will cause a little bit of water to flow out

 

[Uchiha-Sasuke]

What is the difference between branched and unbranched structure of an alkene? for example butene in this case. Can somebody please explain and show me the drawn ones? thanks a lot

View it as "branches of trees"
NOTE: this is for butene
you can even make different branches with different isomers

 

[asadalam]

You normally use a funnel as it ensures all the liquid goes in to the container. Using a burette will cause a little bit of water to flow out

A funnel?You mean a pipette?I dont get what you're saying

 

[Awesome12]

A funnel?You mean a pipette?I dont get what you're saying

 

[asadalam]

In the lower part a burette is attached?Dont we use burette for titrations always?

 

[princess Anu]

Q Is it that powdering the catalyst increases the Rate of Reaction more than it could have been with lump of catalyst? or is it the same

 

[Uchiha-Sasuke]

Q Is it that powdering the catalyst increases the Rate of Reaction more than it could have been with lump of catalyst? or is it the same

powdered catalyst increases rate that's why catalyst is powdered in catalytic converters in cars

 

[princess Anu]

You normally use a funnel as it ensures all the liquid goes in to the container. Using a burette will cause a little bit of water to flow out

But, the narrow necked funnel they are referring to can only be conical flask no? Then why not burette as we normally do in titrations

 

[princess Anu]

passing Chlorine through universal indicator will change its colour or no?

 

[Uchiha-Sasuke]

passing Chlorine through universal indicator will change its colour or no?

It will bleach it .

 

[Awesome12]

But, the narrow necked funnel they are referring to can only be conical flask no? Then why not burette as we normally do in titrations

See in the funnel you cant measure the volume of liquid added. In burette you can do so and you can also add the liquid drop by drop

 

[ciesgetoveralready]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Chemistry (5070)/5070_s13_qp_41.pdf


Q8 part j ? :/ I know the answer but I need to know how to get it

 

[Uchiha-Sasuke]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Chemistry (5070)/5070_s13_qp_41.pdf


Q8 part j ? :/ I know the answer but I need to know how to get it

we've calculated moles of water in i) for sample of FeSO4 in j)
FeSO4 ----H2O
0.0223 -->0.0872
1 ---> 0.0872/0.0223 * 1
=3.91