SodiumSulfideHydrochloricAcidNetIonicEquation
The chemical equation for the reaction of sodium sulfide ($Na_2S $) with hydrochloric acid ($HCl $) is: $Na_2S + 2HCl = 2NaCl + H_2S ↑ $.
When it is rewritten as an ionic equation, $Na_2S $, $HCl $, $NaCl $are all strong electrolytes, which are completely ionized in solution and can be split into ionic forms, while $H_2S $is a gas and cannot be split.
The ionic equation is: $S ^ {2 - } + 2H ^ += H_2S ↑ $.
The following is described in classical Chinese form:
Now there is sodium sulfide and hydrochloric acid. Sodium sulfide is separated into sodium ions and sulfur ions in water, and hydrochloric acid is also separated into hydrogen ions and chloride ions. When the two are mixed, sulfur ions meet hydrogen ions and combine to form hydrogen sulfide gas to escape. Sodium ions and chloride ions still exist in the liquid without changing their state. Therefore, the formula for net ions is: sulfur ions combine with hydrogen ions to form hydrogen sulfide gas, that is, $S ^ {2 - } + 2H ^ += H_2S ↑ $.
When it is rewritten as an ionic equation, $Na_2S $, $HCl $, $NaCl $are all strong electrolytes, which are completely ionized in solution and can be split into ionic forms, while $H_2S $is a gas and cannot be split.
The ionic equation is: $S ^ {2 - } + 2H ^ += H_2S ↑ $.
The following is described in classical Chinese form:
Now there is sodium sulfide and hydrochloric acid. Sodium sulfide is separated into sodium ions and sulfur ions in water, and hydrochloric acid is also separated into hydrogen ions and chloride ions. When the two are mixed, sulfur ions meet hydrogen ions and combine to form hydrogen sulfide gas to escape. Sodium ions and chloride ions still exist in the liquid without changing their state. Therefore, the formula for net ions is: sulfur ions combine with hydrogen ions to form hydrogen sulfide gas, that is, $S ^ {2 - } + 2H ^ += H_2S ↑ $.

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