I am doing an entropy lab and my lab group is using NH4Cl (s) and H2O (l) to make an endothermic reaction. I need to know the products of the reactionPeople have different answers: NH3 + HCl +...

I am doing an entropy lab and my lab group is using NH4Cl (s) and H2O (l) to make an endothermic reaction. I need to know the products of the reaction

People have different answers:

NH3 + HCl + H2O

NH4­+ + Cl-

NH4OH + HCl

I know that according to solubility rules, NH4Cl deionizes.

NH4Cl + H2O -> ?

Thanks for any help given.

 

Asked on by polisciman

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ndnordic | High School Teacher | (Level 2) Associate Educator

Posted on

What you are doing is not really an endothermic reaction but rather a "heat of solution" lab.  When you dissolve NH4Cl in water you get a solution of NH4+ and Cl- ions in water and a large amount of energy is absorbed when the NH4Cl dissolves. So basically you have the ammonium chloride solid dissociating in water to form positive and negative ions.

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