Determination of total dissolved solids (expressed as p.p.m.) in a water sample by evaporationbeakeroven.gifThe steps in the method for determining the total dissolved solids in a water sample are shown below, but they are mixed up.Place them in their correct order.

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Find the mass of a clean dry 250 cm³ beaker
Add 100 cm3 of a filtered water sample to the beaker
Evaporate to dryness in a dust-free oven at 105 degrees Celsius
Find the mass of the cooled dry beaker
Calculate the total dissolved solids in the water sample in mg/l (p.p.m.)