how was chemistry paper 22

[A star]

I know your name and school so better be careful if the GT is higher than 39

haha so what i will transfer xD

 

[stella jazz]

CH3COOC2H5.. Ethanoic Acid

i dunno i wrote teriary alcohol....r u sure its an acid?

 

[A star]

i dunno i wrote teriary alcohol....r u sure its an acid?

yup it was ethanoic acid . i double checked it. the alcohol formed after hydrolyses would be oxidised

 

[kazi umayer]

so MgO is right? i wrote the same wid 6.5 pH nd white flame ...bt im confused? dey askd fr colord flame so ?

Ya all good

 

[syed1995]

Well if they asked for colored flame.. I don't think they mean a white color flame included.. since then that will include all the oxides.. any thoughts A star?

 

[syed1995]

yup it was ethanoic acid . i double checked it. the alcohol formed after hydrolyses would be oxidised

huh you like double checking things a lot

 

[Beaconite007]

Well if they asked for colored flame.. I don't think they mean a white color flame included.. since then that will include all the oxides.. any thoughts A star?

White is not classified as a colour in the mark schemes.
I remember the examiners refuted Mg once in the pastpapers.

 

[syed1995]

White is not classified as a colour in the mark schemes.
I remember the examiners refuted Mg once in the pastpapers.

that's what I thought.

 

[Ash1994]

i wrote IClhas the strongest dipole as the difference between the electronegativity of chlorine and iodine is the greatest
is that right?

 

[A star]

Well if they asked for colored flame.. I don't think they mean a white color flame included.. since then that will include all the oxides.. any thoughts A star?

u needed to state colour of flame right it only discluded few elements magnesium might be accepted its upon the examiners discretion and upon the ms i guess

 

[Muddy]

hey nacl conducts too!

Examiner wants covalent chloride and so the answer is Al .. Nacl is an ionic compound

 

[A star]

Examiner wants covalent chloride and so the answer is Al .. Nacl is an ionic compound

muddy not the only answer

 

[s_hithappens]

was any of the others Al too? or just one? i remember writing both Na and Al

 

[A star]

was any of the others Al too? or just one? i remember writing both Na and Al

the last one was Al too

 

[shah zaib]

i wrote IClhas the strongest dipole as the difference between the electronegativity of chlorine and iodine is the greatest
is that right?

yes, this is correct.

 

[s_hithappens]

the last one was Al too

okay....

 

[A*(a*)]

well i wrote phosphorus didnt go to any risky element what made u guys choose a risky one:/

Guys I wrote Na :/ not appreciating that a co-valent chloride was asked :/ and Al is wrong . I collected from diff Mark schemes that Na and Mg dissolve in water but Al to S all chlorides react!
It was v.v.tricky H seems to fit all the conditions, many of us would not even think of that!

 

[A star]

Guys I wrote Na :/ not appreciating that a co-valent chloride was asked :/ and Al is wrong . I collected from diff Mark schemes that Na and Mg dissolve in water but Al to S all chlorides react!
It was v.v.tricky H seems to fit all the conditions, many of us would not even think of that!

it said dissolved to form a solution but my friend HCl also disociates when dissolves in water it also reacts toform H3O and Cl- so in this respect no element shown was right

 

[s_hithappens]

what was the question exactly?what 'covalent' chloride dissolves in water and conducts electricity?? i have a feeling they didnt say covalent CIE wouldnt ask such a complicated question for 1 mark.

 

[Ash1994]

Guys I wrote Na :/ not appreciating that a co-valent chloride was asked :/ and Al is wrong . I collected from diff Mark schemes that Na and Mg dissolve in water but Al to S all chlorides react!
It was v.v.tricky H seems to fit all the conditions, many of us would not even think of that!

I think i wrote Si for that is it write?