Oh and also for the evidence that shows why aluminium chloride is more covalent that magnesium chloride can we say that aluminium chloride has a higher latyice enthalpy? 😕

Reply 164

Sunethra

Original post by Becka99

Oh and also for the evidence that shows why aluminium chloride is more covalent that magnesium chloride can we say that aluminium chloride has a higher latyice enthalpy? 😕

I said that aluminium has a greater charge that magnesium and also that it is smaller than magnesium therefore the charge density of alcl is greater than mgcl. Alcl has more polarizing power that mgcl thus forming a covalent bond

Reply 165

Becka99

Original post by Sunethra

Yeah I mentioned all that but they asked for one piece of evidence to prove this ..so then can I mention that aluminum chloride has a higher lattice enthalpy?

Reply 166

Sunethra

Original post by Becka99

Yeah I mentioned all that but they asked for one piece of evidence to prove this ..so then can I mention that aluminum chloride has a higher lattice enthalpy?

I just said tht it had a greater charge density. Doesn't all the other things you have told prove that its a covalent bond? I don't no for sure. lattice enthalpy is a measure of attraction.

Reply 167

Sandy_Vega30

Original post by Becka99

For the catalyst question can we write that heating it provides the activation energy needed to initiate the reaction?

And for the helium question is it wrong if i mentioned it is less dense?

I don't think its wrong. Less Dense means light. :smile:

Reply 168

Becka99

Original post by Sunethra

I just said tht it had a greater charge density. Doesn't all the other things you have told prove that its a covalent bond? I don't no for sure. lattice enthalpy is a measure of attraction.

I thought when they asked for evidence they required us to provide some physical or chemical property to justify the statement 😬

Reply 169

Sandy_Vega30

Original post by Sunethra

I just said tht it had a greater charge density. Doesn't all the other things you have told prove that its a covalent bond? I don't no for sure. lattice enthalpy is a measure of attraction.

You have to talk about electron density maps in this case.

Reply 170

Sandy_Vega30

Original post by tejsanghavi

doesnt the gas deposit exist naturally?

Not sure what you mean, could you elaborate? :colondollar:

Reply 171

Sunethra

Original post by Sandy_Vega30

You have to talk about electron density maps in this case.

Yes, I talked about the electon density maps of aluminum chloride and illustrated it on the side

Reply 172

Sandy_Vega30

Original post by I <3 WORK

For the drawing of the line to show deflection question - I drew it above but wrote specifically most deflected. Would I still get the mark?

Since the question was asking you to draw and not STATE what the effect of a lighter ion would be, i do not think you will get the mark. But it also depends on the examiner, so *fingers crossed* :smile:

Reply 173

username2640413

Original post by Sunethra

Yes, I talked about the electon density maps of aluminum chloride and illustrated it on the side

What if we talked about the close values for theoretical and real lattice energies in mgcl but different in alcl?

Reply 174

Sunethra

Original post by Mimiastc

What if we talked about the close values for theoretical and real lattice energies in mgcl but different in alcl?

That's seems right but since they haven't given values I don't know. fingers crossed hoping its right.

Reply 175

username2640413

Original post by Sunethra

That's seems right but since they haven't given values I don't know. fingers crossed hoping its right.

Okay thanks ☺️ Guys when will model answers be released??

Reply 176

userk 12

what did you guys get for the reformation question

Reply 177

Willandy123

Original post by Mimiastc

What if we talked about the close values for theoretical and real lattice energies in mgcl but different in alcl?

Thats what I wrote too.

Reply 178

Willandy123

Original post by userk 12

what did you guys get for the reformation question

D, rest were cracking

Reply 179

Sandy_Vega30

Original post by Willandy123

D, rest were cracking

Isn't reforming the process in which straight-chain molecules are converted to branched forms? If so, it should be A, coz that was the only one forming an alkene.