(Solved): 28. A mixture of Na2O and BaO that weighs 6.00g is dissolved in water, and the solution is ...

28. A mixture of ${\mathrm{Na}}_2\mathrm{O}$ and $\mathrm{BaO}$ that weighs $6.00\mathrm{g}$ is dissolved in water, and the solution is then treated with dil. ${\mathrm{H}}_2{\mathrm{SO}}_4$. Barium sulphate, ${\mathrm{BaSO}}_4$, precipitates from the solution, but sodium sulphate, ${\mathrm{Na}}_2{\mathrm{SO}}_4$, is soluble and remains in solution. The ${\mathrm{BaSO}}_4$ is collected by filtration and is dried and found to weigh $6.00\mathrm{g}$. What percent of the original sample is $\mathrm{BaO}$ ? [65.7\%]