Biology; Chemistry; Physics: Post your doubts here!

[A star]

It will be a slant line upto 100m after which it will be a straight one...the same graph as the one i told u earlier today...

you really like graphs dont you?

 

[ayeshaK]

It will be a slant line upto 100m after which it will be a straight one...the same graph as the one i told u earlier today...

Oh thank God !! I thot im bad with graph but im geting thm correct anyways thanks alot

 

[A star]

Oh thank God !! I thot im bad with graph but im geting thm correct anyways thanks alot

y arent you giving practical ?its much more intresting

 

[ayeshaK]

y arent you giving practical ?its much more intresting

Do we have o level practicals in pakistan ? I didnt knew dat

 

[A star]

Do we have o level practicals in pakistan ? I didnt knew dat

no i thought u gave ur real location. u lived in Abu dhabi because i always wanted practicals but am not allowed

 

[ayeshaK]

no i thought u gave ur real location

No i live in abu dhabi but im here for giving o level papers

 

[A star]

O i live in abu dhabi but im here for giving o level papers

ok

 

[ayeshaK]

ok

Are practicals easyy ?
I find atp easy cz in practical anything can go wrong !!

 

[ashiqbal]

Are practicals easyy ?
I find atp easy cz in practical anything can go wrong !!

practicals are way easier than ATP, esp BIOLOGY! physics and chem ATP are Ok!

 

[Mayedah]

Question
A mole of hydrated copper (II) sulphate ,CuSO4.5H2O ,is dissolved in water
How many moles of ions does the solution contain !
A) 1
B) 2
C) 6
D) 7

 

[Rimsa]

Question
A mole of hydrated copper (II) sulphate ,CuSO4.5H2O ,is dissolved in water
How many moles of ions does the solution contain !
A) 1
B) 2
C) 6
D) 7

C???

 

[Mayedah]

C???

Yeah i also thought its C but its B :/

 

[ashiqbal]

Question
A mole of hydrated copper (II) sulphate ,CuSO4.5H2O ,is dissolved in water
How many moles of ions does the solution contain !
A) 1
B) 2
C) 6
D) 7

B i think! one mole Cu, one mole SO4, and the rest are spread out in water!

 

[ashiqbal]

Yeah i also thought its C but its B :/

YUP! got it right! Silai machine Spidey21?

 

[Spidey21]

YUP! got it right! Silai machine Spidey21?

le le yar tujhse barh kar hai???

 

[Mayedah]

B i think! one mole Cu, one mole SO4, and the rest are spread out in water!

Yeah but y wont we include 5 moles of water they are also present in solution !

 

[Rimsa]

err why wont SO4 ion split up? :s ashiqbal

 

[ashiqbal]

Yeah but y wont we include 5 moles of water they are also present in solution !

if u r adding 5 moles of water, then u might as well add the 5000 moles of water that it is dissolved in!

err why wont SO4 ion split up? :s ashiqbal

no! SO4 ions are radicals, and they exist as SO4 2- ions in aqueous form, this much should be clear from various electrolysis!

 

[MustafaMotani]

Appreciated , but you are a bit too late brother!
4-5 Mnemonics have already been shared while Chemistry ATP was discussed!
P.S this one was included in that too!

Oh I had no idea ..
I got that at school

 

[MustafaMotani]

which year question... ??

Topic people, back on topic.
View attachment 11042View attachment 11043

Its like
2H+(ion) + SO4(-2) = H2SO4
So if H2SO4 have 0.025 moles then H+ ion would have 0.05 moles thus conc = 0.05/0.025