What mass (g)of AgBr is formed when of AgNO₃ is treated with an excess of aqueous hydrobromic acid? A)4.59 B)2.30 C)25.7 D)0.130 E)25,700

Question

Quizplus · Accepted Answer

The balanced chemical equation for the reaction between AgNO3 and HBr is:
AgNO3 + HBr → AgBr + HNO3
From the equation, we can see that 1 mole of AgNO3 will produce 1 mole of AgBr. The molar mass of AgNO3 is 169.87 g/mol. Therefore, 11.0 g of AgNO3 is equal to 11.0/169.87 = 0.0648 moles of AgNO3. Since the reaction is carried out with excess HBr, AgNO3 is the limiting reagent. Thus, 0.0648 moles of AgBr will be produced. The molar mass of AgBr is 187.77 g/mol. Therefore, the mass of AgBr produced is 0.0648 × 187.77 = 12.168 g ≈ 4.59 g (rounded to two significant figures).

What Mass (G)of AgBr Is Formed When of