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Magnesium oxide is a very inert substance. It does not disolve readily in water but dos dissolve in acids.

the reaction with concentrated hydrochloric acid is exothermic.

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Q: Is the reaction between MgO and 2HCl endothermic or exothermic?
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Is hydrocholric acid and magenesium is a endothermic or exothermic reaction?

It is exothermic. Heat will be released to the environment in this reaction. It is also a single replacement reaction. Here is the equation: 2HCl + Mg --> MgCl2 + H2


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Where can you find a particle diagram of the reaction between Hydrochloric acid and magnesium?

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