ZnBr2 is the only compound that will precipitate when combined with LiOH.
What is a precipitation reaction ?
- When dissolved substances react, one (or more) solid products are produced, which is known as a precipitation reaction.
- These kinds of reactions, which are also occasionally known as double displacement, double replacement, or metathesis reactions, frequently involve the exchange of ions between ionic compounds in aqueous solutions.
- The chemical reaction between potassium chloride and silver nitrate, in which solid silver chloride is precipitated out, is one of the greatest examples of precipitation reactions. This is the precipitation reaction's byproduct, the insoluble salt.
- The balanced molecular chemical equation for the precipitation reaction between aqueous solutions of sodium chloride and silver nitrate is: NaCl(aq) + AgNO3(aq) NaNO3(aq) + AgCl (s)
In this case,
a reaction between LiOH and ZnBr2 would be as follows;
2LiOH + ZnBr2 ----------> 2LiBr + Zn(OH)2 (s)
Zn(OH)2 is an insoluble salt and will precipitate out in the solution.
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