calculate the present of BaO in 29.0g of a mixture of BaO and CaO which just react with 100.8 ml of 6.00M HCL
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Asked on December 27, 2019 by
Neenad Utge
10 g of a mixture of BaO and CaO requires 100cm
3
of 2.5M HCl to react completely. The percentage of calcium oxide in the mixture is approximately?
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ANSWER
Gram equivalent in 2.5 M HCl=100×2.5/1000
=0.25
and this is must be equal to the sum of the both gram eq. (BaO + CaO)
2HCl+BaO→BaCl
2
+H
2
O ; x/2 moles of HCl react with BaO
2HCl+CaO→CaCl
2
+H
2
; x/2 moles of HCl reacts with CaO
Thus;
MM(BaO)
2x
+
MM(CaO)
2x
=0.25
153
2x
+
56.07
2x
=0.25
x=5.208
So % of CaO =
10
x×100
=52.08% or 52.1
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