Stochiometry problem

Summary:

an elementary problem with an exceptional application part.

Stochiometry problem

Karan Singh 1208331921|%e %b %Y, %H:%M %Z|agohover

A 1.000 g of Cuprous oxide ( Cu₂O ) and cupric oxide ( CuO ) is taken and is quantitatively reduced to 0.839 g of metallic copper ( Cu ). If atomic weight of Cu is 64.5 and atomic weight of O is 16 ( which is true , of course ! ), find the weight of CuO in the sample.

NOTE : the above problem has been inspired from the example 1.10 of University Chemistry, by Bruce H. Mahan.

Re: Stochiometry problem

pardesi 1208337135|%e %b %Y, %H:%M %Z|agohover

i think principal of atom conservation shud solve this easily

Re: Stochiometry problem

Karan Singh 1208339111|%e %b %Y, %H:%M %Z|agohover

correct abs correct

Re: Stochiometry problem

hell_ever_ 1208363382|%e %b %Y, %H:%M %Z|agohover

is it approx 0.5724 g??

i solved it using simple stoichiometry relations. What is principle of atom conservation?

Re: Stochiometry problem

madnessweasley 1208363506|%e %b %Y, %H:%M %Z|agohover

refer R C Mukherjee if you have it :)

PS : Its actually easy but im too lazy 2 type :D

Re: Stochiometry problem

hell_ever_ 1208363912|%e %b %Y, %H:%M %Z|agohover

i dont have it…..
so can u plz….?

Re: Stochiometry problem

pardesi 1208364277|%e %b %Y, %H:%M %Z|agohover

get that book da it's damn essential

Re: Stochiometry problem

madnessweasley 1208364423|%e %b %Y, %H:%M %Z|agohover

The principle of conservation os mass, expressed in the concepts of atomic theory, means the conservation of atoms. And if atoms are conserved, moles of atoms shall also be conserved. This is known as the principle of atom conservation

That was from RCM :)

Example

(1)

in this eqn, the no. of moles of A shd be same in the LHS and the RHS
therefore moles of A in AB = moles of A in AD

(2)

Re: Stochiometry problem

madnessweasley 1208364489|%e %b %Y, %H:%M %Z|agohover

par, its not damn essential but i agree its useful

PS : An excellent teacher is always sufficient for this pattern :D

Re: Stochiometry problem

hell_ever_ 1208364585|%e %b %Y, %H:%M %Z|agohover

i use p.bahadur…
that aint enough??

ive heard my friends say (who have started inorganic) that there is no fixed process (like organic reactions)
in inorganic chemistry.
Is there any choice other than learning by rote??
my friends use jd.lee

and im too lazy to by-heart any chemistry.

Re: Stochiometry problem

madnessweasley 1208364835|%e %b %Y, %H:%M %Z|agohover

inorganic chemistry can be learnt well by writing many tests and reading many questions, whenever you are bored :)

See this for inorganic questions :)

PS : Anand will start crying if i dont tell you all that it was he who gave me that link :D

Re: Stochiometry problem

albert einstein 1208402831|%e %b %Y, %H:%M %Z|agohover

P.Bahadur is the best book but anyways to be strong in diff types of problems you need to be thorough with RCM

MOD EDIT: Please pertain to topic and no unnecessary comments allowed especially from hypocrites

last edited on 1208404610|%e %b %Y, %H:%M %Z|agohover by madnessweasley + show more