Question

What mass (g) of AgBr is formed when 41.8 mL of 0.152 M AgNO3 is treated with an excess of aqueous hydrobromic acid?

Answer 1

Answer:

m AgBr = 1.193 g

Explanation:

• AgNO3 + HBr → AgBr + HNO3

∴ V AgNO3 = 41.8 mL = 0.0418 L

∴ [ AgNO3 ] = 0.152 mol/L

∴ Mw AgBr = 187.77 g/mol

⇒ n AgNO3 = (0.0418 L)(0.152 mol/L) = 6.3536 E-3 mol AgNO3

⇒ n AgBr = (6.3536 E-3 mol AgNO3)(mol AgBr/mol AgNO3) = 6.3536 E-3 mol AgBr

⇒ m AgBr =  (6.3536 E-3 mol AgBr)(187.77 g/mol) = 1.193 g AgBr