ANDREW LAMBERT PHOTOGRAPHY / SCIENCE PHOTO LIBRARY ANDREW LAMBERT PHOTOGRAPHY / SCIENCE PHOTO LIBRARY
Zinc (Zn) reacting with hydrochloric (HCl) acid in a test tube. This reaction produces zinc chloride (ZnCl2) and hydrogen gas (H2), which is seen bubbling through the solution. The equation for the reaction is: 2Zn + 2HCl ---> 2ZnCl + H2.
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