Chemistry: Post your doubts here!

[Zaki ali asghar]

i think the people who chose ACL3 thought that due negative power, the numbers were decreasing but they were actually increasing.

 

[anastasia grey113]

A ON 20
A ON 20
A ON 20
PLEASE

ik plz pray for that

 

[anastasia grey113]

i think the people who chose ACL3 thought that due negative power, the numbers were decreasing but they were actually increasing.

wait in the table
the numbers were increasing downwards right?

 

[sterryfox]

The reason I choose KCL was that it required the least amount of moles as compare to others, like the concentrations were given so you could calculate the amount required and because it was talking about cation as well.

Same now i just hope its right

 

[Error Syntax]

but that was for iron which was positively charged aint it?

Fe203 was postively charged and so the whole question talked about the negative ion of Sulphate and how Sulphate caused precipiation so by that relatonship Arsenic was negatively charged so over here we needed to talk about the positively charged ion

 

[sterryfox]

wait in the table
the numbers were increasing downwards right?

yes

 

[anastasia grey113]

Same now i just hope its right

well from the trend
i could make out that the more opposite the charge was, the lesser the amount was required to ppt. it
and AlCl3 had the highest amount becuz Fe was positively charged
while arsenic was negative so the most positive had to be the most effective and required least mass

 

[anastasia grey113]

Fe203 was postively charged and so the whole question talked about the negative ion of Sulphate and how Sulphate caused precipiation so by that relatonship Arsenic was negatively charged so over here we needed to talk about the positively charged ion

yh
but AlCl3 was more positive so wasnt it post to be more effective?

 

[Zaki ali asghar]

but acc to table ALCL3 req the greatest mass

 

[anastasia grey113]

but acc to table ALCL3 req the greatest mass

ohhhhhhhh yh now i get it lol
shiz m defo getting a 23 now

 

[Error Syntax]

yh
but AlCl3 was more positive so wasnt it post to be more effective?

The table of concentrations that caused ppt were based on that effectiveness of charge and the least amount of moles required was for KCL3 which was around 1.02x10^-3 others increased downwards

 

[Zaki ali asghar]

i am losing so many marks. SHIT. acc to threshold the minimum i scored last year was a 97. Still need around 100 for an A*. :"(

 

[anastasia grey113]

but acc to table ALCL3 req the greatest mass

no wait wut?
lol idk now m confused
cuz Mr was different for all so moles were different

 

[Holmes]

ohhhhhhhh yh now i get it lol
shiz m defo getting a 23 now

Still on the "A" borderline

 

[anastasia grey113]

The table of concentrations that caused ppt were based on that effectiveness of charge and the least amount of moles required was for KCL3 which was around 1.02x10^-3 others increased downwards

was the trend of no. of moles increasing as charge increased?

 

[Holmes]

was the trend of no. of moles increasing as charge increased?

yes

 

[Error Syntax]

was the trend of no. of moles increasing as charge increased?

yeah it was increasing the power of 10 was constant but the values were increasing

 

[anastasia grey113]

yeah it was increasing the power of 10 was constant but the values were increasing

so AlCl3 ACCORDING TO THE TABLE FOR IRON SOL had more moles than KCl
if thaz the case, i still agree with my answer

 

[Zaki ali asghar]

it was the minimum amount of moles needed to form a solution, wouldn't the one with the least be more effective?

 

[Holmes]

MY SUGGESTION TO EVERYONE HERE IS TO FORGET CHEMISTRY FOR NOW AND STICK TO PHYSICS P4.
IT"S NO USE CRYING OVER SPLIT MILK.
I ALSO HAD A HORRIBLE DAY TODAY, BUT IT'S LIFE GUYS.
IT IS WHAT IT IS.