- #1
monica_e826
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i might get confusing cause i don't understand this very much
but here is the copy of my lab i need help with #1 & 6 of the POST-ALAYSIS
here is the word doc. of my lab
http://courses.digitaldapp.org/documents/Inquiry Lab - Experiment 03 - Composition of a Hydrate.doc
btw.
5 grams of copper II sulfate was used
when it became an anyhride it had a mass of 0.15g
i know i made a mistake somewhere in my lab and i was wondering if you tell where my mistake is and what i should do. i would highly appreciate it.
so i know...
CuSO4 . 5H2O
molar weight is 249.69g
by itself is
CuSO4 = 159.61g
5H2O= 90.81
so i took the
mass of the water/total mass of hydrate x100= 36% of H2O removed in anhydrous copper (II) sulfate.
am i correct?
this is where i got confused...
-determine the # of moles of water present in each mole of hydrous copper (II) sulfate.
so what i did was:
5H2O
H10= 11%=11/1.0079=10.91=2
O5=88%=88/15.9994=5.5=1
is this the correct Empirical formula?
2H10O5 & can be simplified to 2H2O
so now what do i use to find the amount of moles of water present?
but here is the copy of my lab i need help with #1 & 6 of the POST-ALAYSIS
here is the word doc. of my lab
http://courses.digitaldapp.org/documents/Inquiry Lab - Experiment 03 - Composition of a Hydrate.doc
btw.
5 grams of copper II sulfate was used
when it became an anyhride it had a mass of 0.15g
i know i made a mistake somewhere in my lab and i was wondering if you tell where my mistake is and what i should do. i would highly appreciate it.
so i know...
CuSO4 . 5H2O
molar weight is 249.69g
by itself is
CuSO4 = 159.61g
5H2O= 90.81
so i took the
mass of the water/total mass of hydrate x100= 36% of H2O removed in anhydrous copper (II) sulfate.
am i correct?
this is where i got confused...
-determine the # of moles of water present in each mole of hydrous copper (II) sulfate.
so what i did was:
5H2O
H10= 11%=11/1.0079=10.91=2
O5=88%=88/15.9994=5.5=1
is this the correct Empirical formula?
2H10O5 & can be simplified to 2H2O
so now what do i use to find the amount of moles of water present?