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Chemistry P1 and P2 today

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188
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53
what was the answer of the mcq in which we had to separate gas Z from X,Y and Z? the one in which a diagram was given!
I did D bcoz Oxygen was insoluble!
 
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what was the answer of the mcq in which we had to separate gas Z from X,Y and Z? the one in which a diagram was given!
I did D bcoz Oxygen was insoluble!

Nitrogen, Oxygen and Hydrogen all three are insoluble. You had to look for the option in which the other two gases would be separated which was A - Hydrogen, Carbon Dioxide and Nitrogen. Hydrogen reacted with the copper (II) sulphate, Carbon Dioxide was absorbed by the NaOH and only Nitrogen passed on through to the collection tube.
 
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I attempted this question and my answer was .4 g I think. From the graph the volume of CO2 evolved was 96 cm. So the moles of CO2 would be 96/24000=.004 moles
In the next part as the molar ratio of CaCO3 to CO2 is according to this equation CaCO3 + 2HCl=CaCl2 + H2O + CO2 1:1 so
0.004 * CaCO3 MR
0.004 *100=0.4 g
i did it the same way...''high five''
 
Messages
188
Reaction score
158
Points
53
Nitrogen, Oxygen and Hydrogen all three are insoluble. You had to look for the option in which the other two gases would be separated which was A - Hydrogen, Carbon Dioxide and Nitrogen. Hydrogen reacted with the copper (II) sulphate, Carbon Dioxide was absorbed by the NaOH and only Nitrogen passed on through to the collection tube.
this is all the fault of the book from which i studied! :(
it does not have nitrogen in the solubility list! i only memorized that H2 and O2 are insoluble while all others are soluble! :cry:
 
Messages
2,797
Reaction score
2,035
Points
273
this is all the fault of the book from which i studied! :(
it does not have nitrogen in the solubility list! i only memorized that H2 and O2 are insoluble while all others are soluble! :cry:

Well, I didn't study the solubility of gases, but I knew which ones were insoluble. Although, I didn't even take in account the solubility of the gases in the MCQ!
 
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