Asolid mixture weighs 0.6813 g. it contains gallium bromide (gabr3) and other inert impurities. when the solid mixture was dissolved in water and treated with excess silver nitrate (agno3), 0.368 g of agbr was precipitate. a balanced chemical equation describing the reaction is provided below. gabr3(aq) + 3 agno3(aq) ⟶ 3 agbr(s) + ga(no3)3(aq) what is the percent of mass of gabr3 in the solid mixture?

29.6%

Explanation:

Let's consider the following balanced equation.

GaBr₃(aq) + 3 AgNO₃(aq) ⟶ 3 AgBr(s) + Ga(NO₃)₃(aq)

We can establish the following relations.

The mass of GaBr₃ that produced 0.368 g of AgBr is:

The mass percent of GaBr₃ in the 0.6813 g-sample is:

(0.202g/0.6813g) × 100% = 29.6%

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