A mixture contain `61.2% BaO, 28% CaO ` and `10.8 % ( `silica `)` impurities. What volume in mL of `3:00 MHCl` would be required to react completely with `1g` of the mixture ?

Options

A. a. `9mL`
B. b. `10mL`
C. c. `15mL`
D. d. `20mL`

Answer

1

Explanation

wt. of BaO `=(1xx61.2)/(100)=0.612g." moles"=(0.612)/(153)=0.004`
wt of CaO`0.28g" moles of CaO"=(0.28)/(56)=0.005 mol.`
`BaO+2HCl rarr BaCl_(2)+H_(2)O`
`0.004" "0.04xx2`
`CaO+2HClrarrCaCl_(2)+H_(2)O`
`0.005" "2xx0.005`
number of moles of HCl required `=0.008+0.01=0.018`
`MV_(L)=0.018`
`3xx(V_(mL))/(1000)=0.018`
`V=9mL`