Dilution method formula

Many students always get confused when using the dilution method formula especially when susbstituting value for V₁.

For the above situation, we shall substitute the value as follows.

M₁V₁ = M₂V_{2
2V1 = 0.2(100)
V1= 10 cm³}

From the calculation, we know that

1. 10 cm³ of is pipetted from 2.0 mol dm^-3 sodium hydroxide solutoin and transferred into a volumetric flask.
2. 90 cm³ of distilled water is added into the volumetric flask. The volumetric flask is shaken well.
3. 100 cm³ of 0.2 mol dm^-3 sodium hydroxide solution is ready.