2. You have been tasked with preparing one litre of 1M, 2M and 3M solutions of sodium

hydroxide. To complete the task, you have access to an analytical balance with a maximum

capacity of 60g that is accurate to the nearest 0.01g, 3 one litre volumetric flasks, accurate

to ±0.12mL.

a. Determine the uncertainty in the concentration of each of the solutions using the

balance and the one litre flasks. [8C₁ = ±1.73 10-4M, 8C₂ = ±2.98* 10-¹M,

SC3= 4.01 10-4M] OR

[8C₁ = +1.73 10-4M, 8C₂ = ±3.47*10-4M, 8C3 = 4.38 10-4M

b. You accidentally break the flask for the 3M solution mid-way through preparing the

solution. Instead, you now need to use four 250mL flasks accurate to ±0.08mL.

Determine the total uncertainty in the concentration of 1L of 3M solution prepared

this way. [SC3b = 4.33 * 10-³M OR 8C3b = 2.165 10-³M]