5g of marble was added to 100 c.c of 0.2 M HCl. What volume of CO2 measured at STP will be evolved in the above reaction

Asked by harsh.mangla.2003 | 3rd Jul, 2020, 04:55: PM

Expert Answer:

Moles of CaCO3 = 5/100 =0.05 moles
Moles of HCl=0.2*100/1000=0.02 moles
This chemical reaction can be written as-
 
CaCO subscript 3 space end subscript plus 2 space HCl rightwards arrow CaCl subscript 2 space plus CO subscript 2 plus straight H subscript 2 straight O
0.05 space space space space space space space space 0.02 space space space space space space space space space

According space to space stoichiometry comma
2 space moles space of space HCl space evolves equals 1 space mole space of space CO subscript 2
1 space mole space of space HCl space will space evolve equals 1 half space mole space of space CO subscript 2
0.02 space mole space of space HCl space will space evolve space equals 1 half cross times 0.02 equals 0.01 space moles space of space CO subscript 2

1 space mole space of space CO subscript 2 space contains equals 22.4 space straight L
0.01 space mole space of space CO subscript 2 space will space have equals 22.4 cross times 0.01 equals 0.224 space straight L

Answered by Ravi | 7th Jul, 2020, 03:11: PM