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# Stuck on basic questions- help plz watch

1. I have some analysis of results questions that are quite basic but I just can't seem to get my head around them.
1. calculate the amount of carbon dioxide gas collected in the measuring cylinder (250ml). Assume that 1 mol of gas occupies 24000cm3 at RTP.

For this one I've done it twice, in two different ways, 1) 250cm3 and 2) 136363.6364cm3
I'm quite certain they're not right

2. Copper (II) carbonate basic reacts with sulphuric acid, as below:

CuCO3.Cu(OH)2(s) + 2H2SO4(aq) = 2CuSO4(aq) + 3H2O(l) + CO2(g)

Deduce the amount of copper (II) carbonate, CuCO3(s), that reacted.

I literally have no idea where to start.
Any help would be greatly appreciated
2. Do you need to know the mass of carbon dioxide collected?
3. (Original post by ASHLEYTMK)
Do you need to know the mass of carbon dioxide collected?
I think so
4. there are 1/96 moles of CO2 in 250ml, RFM of 44
Mass= Moles x RFM = 44 x 1/96 = 0.45833g of carbon dioxide
5. (Original post by ASHLEYTMK)
there are 1/96 moles of CO2 in 250ml, RFM of 44
Mass= Moles x RFM = 44 x 1/96 = 0.45833g of carbon dioxide
Thank u
6. Not sure about the other one sorry
7. (Original post by Retro_bean)
I have some analysis of results questions that are quite basic but I just can't seem to get my head around them.
1. calculate the amount of carbon dioxide gas collected in the measuring cylinder (250ml). Assume that 1 mol of gas occupies 24000cm3 at RTP.

For this one I've done it twice, in two different ways, 1) 250cm3 and 2) 136363.6364cm3
I'm quite certain they're not right

2. Copper (II) carbonate basic reacts with sulphuric acid, as below:

CuCO3.Cu(OH)2(s) + 2H2SO4(aq) = 2CuSO4(aq) + 3H2O(l) + CO2(g)

Deduce the amount of copper (II) carbonate, CuCO3(s), that reacted.

I literally have no idea where to start.
Any help would be greatly appreciated
Do you have any more data to assist with Q2? Is this the same experiment as Q1?
8. (Original post by TutorsChemistry)
Do you have any more data to assist with Q2? Is this the same experiment as Q1?
Yes
9. (Original post by Retro_bean)
Yes
You already have the number of moles of CO2 formed, and you have an equation that shows that each mole of the copper salt reacts to give a mole of CO2.
The number of moles of the copper salt is therefore the same as the carbon dioxide moles.
It's not clear whether the "amount" asked for is moles or mass. If it is mass you need to calculate the molar mass of the copper salt, then multiply by the number of moles to get the mass that reacted.

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