Mg+Zn(OH)2=Mg+H2SO4=

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Mg + Zn(OH)2 = Mg + H2SO4

This equation appears to be incomplete. It seems to be two separate reactions combined into one. Let's break it down:

Mg + Zn(OH)2 → Mg(OH)2 + Zn

This is a double displacement reaction where magnesium (Mg) displaces zinc (Zn) from zinc hydroxide (Zn(OH)2) to form magnesium hydroxide (Mg(OH)2) and zinc (Zn).

Mg + H2SO4 → MgSO4 + H2

This is a single displacement reaction where magnesium (Mg) displaces hydrogen from sulfuric acid (H2SO4) to form magnesium sulfate (MgSO4) and hydrogen gas (H2).

Therefore, combining the two reactions gives:

Mg + Zn(OH)2 + H2SO4 → Mg(OH)2 + Zn + MgSO4 + H2

I hope this helps clarify the reaction for you. Let me know if you have any other questions.