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
CaCO3+2Hcl gives Co2+CaCl2+H2O
Answers
Explanation:
11th
Chemistry
Some Basic Concepts of Chemistry
Laws of Chemical Combinations
CaCO_3 + 2HCl \rightarrow ...
CHEMISTRY
CaCO
3
+2HCl→CaCl
2
+H
2
O+CO
2
The volume of CO
2
gas formed when 2.5 g calcium carbonate is dissolved in excess hydrochloric acid at 0
o
C and 1 atm pressure is:
[1 mole of any gas at 0
o
C and 1 atm pressure occupies 22.414 L volume].
A .
1.12 L
B .
56.0 L
C .
0.28 L
D .
0.56 L
December 27, 2019
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Rajender Rao
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ANSWER
CaCO
3
+2HCl→CaCl
2
+H
2
O+CO
2
100 g 44 g
1 mole 1 mole
22.4 L 22.4 L
We know that 1 mole of any gas at 0
o
C and 1 atm pressure occupies 22.4 L volume.
So, 100 g CaCO
3
forms 22.4 L of CO
2
Hence, 2.5 g CaCO
3
will form =
100
2.5×22.4
=
100
56
L of CO
2
=0.56 L of CO
2
Hence, the correct option is D