CBSE Class 11-science Answered
What are ionic hydride and ionic chloride?Why do they specify 'ionic'?
Asked by acshanadhana15 | 16 Sep, 2020, 11:17: AM
Expert Answer
Ionic or Saline Hydrides
Ionic hydrides or saline hydrides are binary compounds of hydrogen with s-block elements which are highly electropositive.
In the solid state, the ionic hydrides are crystalline, non-volatile and non-conducting. However, their melts conduct electricity and liberate dihydrogen gas at the anode on electrolysis, confirming the existence of H− ions.
2H−(melt) → H2(g) + 2e−
Saline hydrides react violently with water producing dihydrogen gas.
NaH(s)+H2O(aq) →NaOH(aq) H2(g)
From above it is cleared that ionic hydrides on melting form negatively charged hydrogen ions hence they called as ionic hydride.
(negatively charged hydrogen ions = hydride)
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