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Predict the reactions, if any, when the following hydrogen compounds are added to water, and explain...

Predict the reactions, if any, when the following hydrogen compounds are added to water, and explain your reasoning of why the reaction occur like that (explain the role of H in each case, is it bronsted-lowry acid or base? why?)

a) HBr b) CaH2 c) CH4. d) H2S

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