In a group 1 analysis, a student adds hydrochloric acid to the unknown solution

Question

In a group 1 analysis, a student adds hydrochloric acid to the unknown solution to make [Cl^-] = 0.15 M. Some PbCl_2 precipitates. Calculate the concentration of Pb^2+ remaining in solution. Both KCl and NH_4 Cl are white solids. Suggest reagent that would enable you to distinguish between these two compounds. Describe a simple test that would enable you to distinguish between AgNO_3 (s) and Cu (NO_3)_2 (s). A quantity of 0.560 g of KOH is added to 25.0 mL of 1.00 M HC1. Excess Na_2 CO_3 is then added to the solution. What mass (in grams) of CO_2 is formed? A volume of 25.0 mL of 0.100 M HCl is titrated against a 0.100 M NH_3 solution added to it from a buret. Calculate the pH values of the solution (a) after 10.0 mL of NH_3 solution have been added, (b) after 25.0 mL of NH, solution have been added, (c) after 35.0 mL of NH_3 solution have been added. To act as an effective buffer, the concentration of the acid and the conjugate base should not differ by more than a factor of 10, that is 10 greaterthanorequalto [conjugate base]/[acid] greaterthanorequalto 0.1. (a) Show that the buffer range, that is, the range of the concentration ratio over which the buffer is effective, is given by pH = oK_a plusminus 1. (b) Calculate the pH range for the following buffer systems: (a) acetate, (b) nitrite, (c) bicarbonate, (d) phosphate.

Explanation / Answer

17.65 NaoH is the best reagent to distinguish between NH4Cl and kCl. when NH4Cl was dissolved in NaoH, ammonia will be released leaving a pungent smell.

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.