Calculate the activity coefficient, y, of Fe²+ when the ionic Ionic Activity strength of the solution, µ, is 0.065 M by linear interpolation strength coefficient of the data in the table. (μ. M) 0.001 0.870 0.005 0.749 0.01 0.675 0.05 0.485 0.1 0.405 Calculate the activity coefficient, y, of Fe²+ when the ionic strength of the solution, µ, is 0.065 M by using the extended Debye-Hückel equation at 25 °C, where the ion size is 600 pm. YFe?+ =

Compute the molarity of KMnO4 solution if 1.0092 g of pure FAS required 25.11 mL of KMnO4 solution to reach end point in an acidic medium. An impure sample of FAS weighed 1.2352 g and it required 26.01 mL of KMnO4 solution (use molarity from Q#2) to reach end point in an acidic medium. Compute %Fe in this sample.

What is the activity coefficient for each ion at the given ionic strength at 25 °C? Activity coefficients at various ionic strengths can be found in this table. SO (μ= 0.1 M) y = Y³+ (μ = 0.01 M) y = Pr³3 + (μ = 0.1 M) Y = (CH₂CH₂)₂NH+ (μ = 0.05 M) y = 0.8 x10 TOOLS

30mL 0.9% v/v green food coloring. Transfer 2mL of of food coloring to flask, QS the flask to 100mL with DI water. What is the concentration of the standard?