For example: In the reaction: Zn (s) + 2HCl (aq) Zn 2+ (aq) + 2Cl – (aq) + H 2 (g) We read this as – Solid zinc and hydrochloric acid in water react to form zinc ion with a 2+ charge in water, chloride ion with a 1– charge in water, and hydrogen gas.
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