Complete the reaction.
2HCl(aq) + K2S(aq) →

The balanced chemical equation is written below.

Explanation:

Double displacement reaction is defined as the reaction in which exchange of ions takes place.

The chemical equation for the reaction of hydrochloric acid and potassium sulfide follows:

By Stoichiometry of the reaction:

2 moles of hydrochloric acid reacts with 1 mole of potassium sulfide to produce 2 moles of potassium chloride and 1 mole of hydrogen sulfide gas

Hence, the balanced chemical equation is written above.

it's c. elements are placed in rows based on how may valencies electrons have.

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