- For example if a 0.1 M solution is required of a standard with a relative mass of 60, then to make up a 250 cm 3 solution requires 0.1 x 60 x 0.25 = 1.5 g. If the tolerance of a 2 d.p. balance is ± 0.005, this represents an inaccuracy of 0.005/1.5 x 100 % = 0.33%.
- Calculating pH for Titration Solutions: Strong Acid/Strong Base A titration is carried out for 25.00 mL of 0.100 M HCl (strong acid) with 0.100 M of a strong base NaOH the titration curve is shown in Figure 1. Calculate the pH at these volumes of added base solution: (a) 0.00 mL (b) 12.50 mL (c) 25.00 mL (d) 37.50 mL. Solution
- When a standard solution is prepared from a solid sample, it is not dissolved in a volumetric flask but in another container. Then, the solution is transferred into the volumetric flask. Because the volume may change at mixing of a sample and a solvent, the sample should not be diluted directly to the marked line without stopping.
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