Will a precipitate form if 55 mL of 0.0500 M AgNO3 is mixed with 60 mL of 0.0225 M NaBr? is Q greater than, equal to, or less than Ksp?
AgBr(s)
Ag+ (aq) + Br- (aq); Ksp = 5.4 ×
10−13
mol Ag+ (aq) = (0.055 L sol'n) (0.050 mol Ag+/L sol'n)
= 0.00275 mol Ag+
[Ag+] = 0.00275 mol / (55 mL + 60 mL)
= 0.00275 mol / 115 mL
= 0.00275 mol / 0.115 L
= 0.0239 M
mol Br-(aq) = (0.060 L sol'n) (0.0225 mol Br-/L sol'n)
= 0.00135 mol Br-
[Br-] = 0.00135 mol / 0.115 L
= 0.00015525 M
Q = [Ag+] [Br-]
= (0.0239) (0.00015525)
= 3.7 x 10-6
Since, Q > Ksp;
AgBr will precipitate from solution.
Get Answers For Free
Most questions answered within 1 hours.