Chemistry DONE!!!

[Pikooooooooo]

And thamer hsm your ans. is 100% correct .. Insh'Allah of course

 

[ganesh]

that's also correct garnesh but i felt magnesium oxide was better

Thanks

 

[ganesh]

yes true, but using either MgO, MgCO3 or Mg(OH)2 is also correct... !

Thanks

 

[thamer hsm]

how can i prove that the insoluble hydroxide of element M is amphoteric?

 

[SherlockHolmes221B]

how can i prove that the insoluble hydroxide of element M is amphoteric?

By bringing two portions of element M, and adding acid to one portion and adding base to the other. If it reacted with both solutions, this means that it is amphoteric. That's what I wrote, at least. ^___^

 

[Pikooooooooo]

how can i prove that the insoluble hydroxide of element M is amphoteric?

it should react with both acid and base .. that's it

 

[Iridescent]

Paper 3 disappointed me a bit with the tiny stoichiometry part. I expected more of it.

 

[ThisMeansWar]

yes true, but using either MgO, MgCO3 or Mg(OH)2 is also correct... !

what about Mg ONLY, i argued with my friend for hours that it will be wrong, but she said that it will form a neutralised salt. please reply jaldi se!

 

[Iridescent]

what about Mg ONLY, i argued with my friend for hours that it will be wrong, but she said that it will form a neutralised salt. please reply jaldi se!

All the three will form a neuralised salt cz which ever you chose, the salt form is the same. Besides, they asked for a method, it had no concern with how many methods are possible. So, if you write any of them, the answer will correct.

 

[ThisMeansWar]

All the three will form a neuralised salt cz which ever you chose, the salt form is the same. Besides, they asked for a method, it had no concern with how many methods are possible. So, if you write any of them, the answer will correct.

AHA!! thank you, thank you, thank you! so how do i get the 3 marks for this question?

 

[Iridescent]

AHA!! thank you, thank you, thank you! so how do i get the 3 marks for this question?

Write the procedure of the method.
-The name of the acid and the reagent(in excess)
-Wait for the reaction to get over
-Filter out the excess
-Evaporate to crystallisation point

 

[ThisMeansWar]

Write the procedure of the method.
-The name of the acid and the reagent(in excess)
-Wait for the reaction to get over
-Filter out the excess
-Evaporate to crystallisation point

thanks, iridescent!

 

[thamer hsm]

By bringing two portions of element M, and adding acid to one portion and adding base to the other. If it reacted with both solutions, this means that it is amphoteric. That's what I wrote, at least. ^___^

i said exactly the same thing and included filtration as proof for reaction,but i guess what you said is enough.

 

[Taimoor821]

the answer for solution of magnesium chloride is as follows.
put 25cm^3 of HCl in a beaker and warm. Add powdered magnesium oxide by means of a spatula and stir by a glass rod. Stop the addition when no more magnesium oxide dissolves and then filter.The filtrate obtained is magnesium chloride solution.

I'm not sure but that's what i wrote.

Even I wrote the same for that question

 

[Taimoor821]

Guys now that we are done with chemistry share ur opinions on gt for A*

it wasnt that hard but at the same time want easy

 

[sara fayed]

guys the question of the soluble salt that was made by titration,the question that asked how to remove the indicator.
in the question did he say that the volume of the acid needed to neutralise the base was NOTED or not?

even if they didnt mention you can simply not the volume and repeat by the same volume (without using the indicator )

 

[sara fayed]

why

Ca^2+ + H2O + CO2

did you write ca^+2 i didnt get ?????

 

[SherlockHolmes221B]

why
did you write ca^+2 i didnt get ?????

It is, supposedly, an ionic equation, This means you need to include the charge.

 

[thamer hsm]

it wasnt that hard but at the same time want easy

Hey taimoor are you the taimoor i know lol...

 

[Prachi mansatta]

which

and there was one ionic equation of displacment of a metal from a salt,what were the reactants again i remember it involved zinc

varient are u guys tkin abt ?