CaCO3+2HCl->CO2+H2O. Experiment gave actual yield of 1.000x10^2g of CO2. Began with 2.00x10^2 of HCl and ample CaCO3 left unreacted, what was the percent of yield?
This means that HCl was the limiting reactant, I assume.
`CaCO_3+2HCl rarr CO_2+H_2O`
Molic weight of `CO_2` = 44`g/(mol)`
Molic weight of HCl `= 36.5g/(mol)`
Actual yield of `CO_2`
`= 2.27 mol`
`= 200/36.5 mol`
`= 5.48 mol`
`HCl:CO_2 = 2:1`
Theoretical `CO_2` that should yield `= 5.48/2 = 2.74 mol`
Mass of theoretical `CO_2` that should yield `= 2.74xx44 = 120.56g`
Percent of yield of `CO_2`
So the percent yield of `CO_2` is 82.95%.
Reasons for loss in percentage of `CO_2`
- `CaCO_3` may not pure and there may have been impurities
- `CO_2` is not collected properly and some of `CO_2` may have lost in collecting process