high range: Add to about 500 mL distilled water 10.216 g K2Cr2O7, primary standard grade, previously dried at 150°C for 2 h, 167 mL conc H2SO4, and 33.3 g HgSO4. Dissolve, cool to room temperature, and dilute to 1000 mL.
high range: Add to about 500 mL distilled water 10.216 g K2Cr2O7,primary standard grade, previously dried at 150°C for 2 h, 167 mL conc H2SO4, and 33.3 gHgSO4. Dissolve, cool to room temperature, and dilute to 1000 mL.