difference between these reactions(chemistry)

[snowbrood]

sodium hydroxide with ammonium chloride. potassium hydroxide with ammonium chloride. ammonia solution with ammonium chloride.calcium hydroxide with ammonium chloride.solid calcium hydroxide with ammonium chloride.

 

[scouserlfc]

i think these are test of CATIONS !
BTW where did u get such a ques !

 

[Warslash]

can any1 provide me notes f moles n electrolysis.....!!!

 

[CaptainDanger]

Chemistry Moles : DOWNLOAD NOTES

Check this website for the Electrolysis HERE

 

[falcon678]

i think these are test of CATIONS !
BTW where did u get such a ques !

me question exactly...where DID u get this kind of a question?? :unknown:

 

[snowbrood]

well its chemistry expression o level practical book

 

[scouserlfc]

so it shud be cation test !

 

[VelaneDeBeaute]

The only thing i don't get is you wrote *Difference between these reactions* ! What kind of difference are you looking for in them ?? I agree these reactions are testing for the presence of a specific cation, but that counts as a similarity, not as a difference ! Doesn't it ??
If i'm not wrong, there has to be a comparison between two reactions, such as the 1st and 2nd, the 3rd and 4th and then 5th and 6th !

 

[snowbrood]

well we get different observations with these diff reactions so i wanted to kw those different observations

 

[manurocksman]

hey snowboard, what was your answer to the last part of the titration part? i got it 0.2...

 

[princex]

please can u help me wid m0les??? =/

 

[sweetiepie]

Check these for moles


-Define mole:1 mole of any substance is its Ar or Mr expressed in grams

-Avogadro Constant are the no. of particles (atoms or molecule) permole of any substance.The value of constant is 6 X

10^23 and is represented as L.

----no. of molecules=no. of moles X L

----no. of atoms=no. of moles of atom X L

-----------where L is 6 X 10^23

-no. of moles = mass of substance/mass of one mole

-no. of moles of gas = volume in dm3 /24 (1dm3=1000cm3)

-no. of moles of solute= conc. X volume (be careful in units either all dm3 or cm3)

-(u shud know how to rearrange an eqn.)

-when the reaction involve only gases then we can use the ratio of volumes instead of mole ratio.

-Percentage yield = actual yield/theoritical yield X100

-Percentage purity = mass of pure substance / mass of impure substance X 100

-steps for finding molecular formula

---find no. of moles(method of finding this differs according to question)

---hence find the mole ratio

---and then calculate emperical formula

---find n which is=>relative molecular mass/emperical formula mass

---then find molecular formula=>(emperical formula)n and simplify

 

[princex]

thankshhhh...=)