Which of the following hydrides, when added to water, would give the most acidic solution?

Question

A Sodium hydride
B Magnesium hydride
C Silicon hydride
D Sulphur hydride

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Answer 1 · 2018-04-23T15:06:51

#D.# ...#"sulfur hydride"#

We gots #H_2S# OR #HS^(-)#...these are weak Bronsted acids...

#H_2S(aq) +H_2O(l) rightleftharpoonsHS^(-) + H_3O^+#

ELSE..

#HS^(-) +H_2O(l) rightleftharpoonsS^(2-) + H_3O^+#

Both the metal hydrides are Bronsted bases...and #SiH_4# would have next to no aqueous solubility....