Final answer:
A precipitation reaction occurs when two aqueous solutions react to form an insoluble solid called a precipitate. In this case, we are mixing solutions of potassium hydroxide and nickel(II) bromide, producing a solid nickel(II) hydroxide precipitate.
Step-by-step explanation:
A precipitation reaction occurs when two aqueous solutions react to form an insoluble solid called a precipitate. In this case, we are mixing solutions of potassium hydroxide and nickel(II) bromide. To write the equation for the precipitation reaction, we first need to determine the chemical formulas of the reactants and products. The formula for potassium hydroxide is KOH and the formula for nickel(II) bromide is NiBr2. The balanced equation for the precipitation reaction is:
KOH + NiBr2 → KBr + Ni(OH)2
In this equation, the solid precipitate is nickel(II) hydroxide (Ni(OH)2). The other product, potassium bromide (KBr), remains in solution as it is soluble.