Chemistry: Post your doubts here!

[blymphocytes]

Does lialh4 or nabh4 reduce alkenes

Alkenes can be reduced further? :O

 

[blymphocytes]

I have a link to p4 feb march 19
If anyone needs tell me ur username

blymphocytes....is my username
Also if you could send me feb-march papaers for maths,bio and chem both AS and A2 if you have them
thanks

 

[student3737]

Which two equations do you actually combine

The first and second, I also tried combining third with the combined first and second if that makes sense

 

[student3737]

How do you do find the hydration of chlorine

 

[blymphocytes]

The first and second, I also tried combining third with the combined first and second if that makes sense

Why these 2....is there a reason?

 

[blymphocytes]

How do you do find the hydration of chlorine

Have you first gotten the enthalpy change of solution?

 

[blymphocytes]

Have you first gotten the enthalpy change of solution?

You need to get the first answer to get the next one!

 

[Blizzarth Swann]

I have a link to p4 feb march 19
If anyone needs tell me ur username

Blizzarth Swann is my name, if possible please send me the qp for chem, bio, math and physics, Thank you.

 

[helloolo]

I have a link to p4 feb march 19
If anyone needs tell me ur username

Hey can i please get the link my username is
helloolo

 

[mittul8yu98]

Go to Facebook and type alphaphysx as username

 

[mittul8yu98]

Why these 2....is there a

Yeah like how do we combine three equations

 

[mittul8yu98]

How do you do find the hydration of chlorine

Which year

 

[student3737]

Have you first gotten the enthalpy change of solution?

Yea I did, i got -160 if I’m correct

 

[student3737]

I mean I don’t really know , I’m just really lost

 

[Hamzaaligt]

how can we determine that the salt is to be prepared by titration or reaction with acid
urgent help

 

[helloolo]

Go to Facebook and type alphaphysx as username

Thanks

 

[blymphocytes]

I mean I don’t really know , I’m just really lost

Yea.....-160 is correct
After that it's not much of a hustle.....use hess law to equate enthalpy change of sol, lattice energy and hydration energy
your eqn will be -2526-160=2x-1890
X in this case is cl ions....and since 2 are need to form mgcl2 so 2x

 

[student3737]

Guys how do you find the order for H?

 

[blymphocytes]

Guys how do you find the order for H?

Is it zero?

 

[student3737]

Is it zero?

It’s one