Sodium hydrogen sulfate, NaHSO₄, is an acidic salt with a number of uses, such as metal pickling (removal of surface deposits). NaHSO₄ is made by the reaction of H₂SO₄ with NaCl. To determine the percent NaCl impurity in NaHSO₄, a 1.016 g sample is titrated with NaOH(aq); 36.56 mL of 0.225 M NaOH is required.

(a) Write the net ionic equation for the neutralization reaction.

(b) Determine the percent NaCl in the sample titrated.

(c) Select a suitable indicator from Figure 17-7.

Figure 17-7

Transcribed Image Text:

Indicator Alizarin yellow-R Thymolphthalein Phenolphthalein Thymol blue (base range) Phenol red pH- 0 Bromthymol blue Chlorphenol red Methyl red Bromcresol green Methyl orange Bromphenol blue Thymol blue (acid range) Methyl violet Yellow Red (b) 2 8 Yellow Violet Red Yellow Red Yellow 5 (a) 10 Yellow 1 6 Yellow Yellow Blue Yellow Yellow-orange Blue-violet Colorless Yellow 1 8 Red Red Blue 9 Colorless Yellow 1 10 (c) Red Blue 11 Blue 12 Violet