A mixture of NaHCO3 and Na2CO3 weighs 950 gm. When the mixture is heated strongly in an open vessel, till constant weight, the mass of sample is reduced by 155 gm. The correct information(s) is/are
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Answered by
0
Answer:
ANSWER
Na
2
CO
3
is a strong base and does not dissociate on normal heating.
2NaHCO
3
⟶Na
2
CO
3
+CO
2
+H
2
O
No. of moles CO
2
=
22400
0.950
=4.24×10
−5
No. of moles of NaHCO
3
=4.24×10
−5
×22400=0.084×10
+3
=84g
Initial NaHCO
3
mass =155g
⇒ Mass percent =
155
84
×100% ≈50%
Answered by
1
Answer:Na
2
CO
3
is a strong base and does not dissociate on normal heating.
2NaHCO
3
⟶Na
2
CO
3
+CO
2
+H
2
O
No. of moles CO
2
=
22400
0.950
=4.24×10
−5
No. of moles of NaHCO
3
=4.24×10
−5
×22400=0.084×10
+3
=84g
Initial NaHCO
3
mass =155g
⇒ Mass percent =
155
84
×100% ≈50%
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