Question

9. Solubility of alkali metal hydroxide
1) Be(OH)2> Mg(OH)2> Ba(OH)2
2) Ba(OH)2<Be(OH), <Mg(OH)2
3) Be(OH)2<Mg(OH)2+ Ba(OH)2
4) Mg(OH), <Be(OH), < Ba(OH)2​

Answer 1

Explanation:

The pH is estimated to be 9 for the solution with the AuPd/Mg(OH)2 catalyst after 4 h reaction on the basis of Mg concentration (1300 ppm). This value is consistent with the pH measured as