Question

what happen when sodium hydrogen react with hydrogen chloride​

Answer 1

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Nothing. You get a mixture of sodium, chloride, and hydrogen ions, but there is no net reaction, because both of the positively charged ions are complemented by chloride ions. If you heat the mixture, the HCl will evaporate out and leave the NaCl behind.

Answer 2

Answer:

sodium hydroxide + hydrochloric ----->nacl + h2o

it is neutralization reaction