Write the balanced chemical reaction for the following and identify the type of reaction in each case.
(A) $M a g n e s i u m_{(a)} + I o d i n e_{(g)} \to M a g n e s i u m i o d i d e_{(s)}$
(B) $Z i n c_{(s)} + H y d r o c h l o r i c a c i d_{(a q)} \to Z i n c c h l o r i d e_{(a q)} + H y d r o g e n_{(g)}$

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Solution

(A) $2 M g_{(s)} + I_{2 (g)} \to 2 M g I_{(s)}$
It is a combination reaction.
(B) $Z n_{(s)} + 2 H C l \to Z n C l_{2 (a q)} + H_{2 (g)}$
It is a displacement reaction in which the more reactive metal Zn displaces hydrogen.

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Write the balanced chemical equation for the following reaction and identify the type of reaction:

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Write the balanced chemical reaction for the following and identify the type of reaction in each case.(A) Magnesium(a)+Iodine(g)→Magnesium iodide(s)(B) Zinc(s)+Hydrochloric acid(aq)→Zinc chloride(aq)+Hydrogen(g)

(A) 2Mg(s)+I2(g)→2MgI(s) It is a combination reaction.(B) Zn(s)+2HCl→ZnCl2(aq)+H2(g) It is a displacement reaction in which the more reactive metal Zn displaces hydrogen.

(A) $2 M g_{(s)} + I_{2 (g)} \to 2 M g I_{(s)}$
It is a combination reaction.
(B) $Z n_{(s)} + 2 H C l \to Z n C l_{2 (a q)} + H_{2 (g)}$
It is a displacement reaction in which the more reactive metal Zn displaces hydrogen.