Question

Question #fcec8

Answer 1

`CaO(s) + 2HNO_3(aq) rarr Ca(NO_3)_2(aq) + H_2O(l)`

Explanation:

`"Moles of calcium oxide"` `=` `(1.5*g)/(56.08*g*mol^-1)=??*"moles"`.

I think your original question would have asked you the concentration of the solution with respect to calcium; and maybe its `pH` if an initial volume were specified.

`"Concentration"` `=` `(1.5*g)/(56.08*g*mol^-1)xx1/("Volume (L)")` `=` `??*mol*L^-1`.

`pH=-log_10{2xx(1.5*g)/(56.08*g*mol^-1)xx1/("Volume (L)")}=??`

Note that `"calcium oxide"` dissolves in water according to the following reaction:

`CaO(s) + H_2O(l) rarr Ca(OH)_2(aq)`