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The back titration of HCl with NaOh in the Kjeldahl Method ensures thr reaction of NH3 and HCl is stoochiometric
TRUE OR FALSE
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- What weight of pure Na2CO3 should be taken so that about 25mL of approximately 0.1M HCl will be used in a standardization titration using methyl red end point?Find the acid number of a raw material sample weighing 1.230 g which required 30 ml of 0.110 N NaOH to bring about the endpoint using KOH in the titration.What volume of KOH is needed to reach the second equivalence point during the titration of 75 ml of 0.075 m malonic acid with 0.0500 m KOH?
- 8. Why are the standard reagents used inneutralization titrations are generally strongacids and strong bases rather than weak acidsand weak bases?if all the N in 10.0 mmols urea, CO(NH2)2, is converted to NH4HSO4, and if, with excess NaOH, the NH3 is evolved and caught in 50.0 mL of HCl (1.00 mL = 0.03000 g CaCO3), what volume of NaOH (1.00 mL = 0.3465 g H2C2O4. H2O) would be required for complete titration? using Kjeldahl's MethodWhy do we use a solid acid as a primary standard? During the standardization of NaOH, Shane didn’t notice that there was an air bubble in the tip of the buret when they started their rough titration. The bubble went away during the rough titration and Shane continued with two fine titrations. Does this affect the calculated concentrations of NaOH? Why or why not?
- Explain why in Mohr's method neutral medium should be used in titration of AgNO3?What is a 3 point pH calibration in Titration? How is it useful?Back titration method is used when the reaction between standard reagent and analyte is : Select one: a. Slow and complete b. Fast and incomplete c. Slow and incomplete d. Fast and complete