1. CL was tasked to identify the white solid inorganic salt that Dr. Yang gave her. From her preliminary tests, the possible identities were narrowed down to the following: Zn(CN)₂ Ksp (30°C) = 7.30 x 1012 AgSCN Kap (30°C) = 5.90 x 10¹1 CL chose to investigate the solubility equilibrium of this salt and determine its identity. To a 100.0 mL distilled water at room temperature, CL added the unknown reagent until it no longer dissolves. After letting the mixture stand for 15 mins, she filtered and collected the filtrate in another beaker. From this, a 20.00 mL aliquot was drawn and was titrated with 10.20 mL of 5.00 x 10 M HCI to reach the phenolphthalein endpoint. A. Let X be the titratable species from the dissolved salt. Determine the concentration of X from the titration data. B. Based on the results of CL's experiment and the provided constants, what is the likely identity of the unknown salt? Show complete solutions to support your answer. When she submitted her report to Dr. Yang, the latter was not convinced because he wants a highly accurate result (i.e. less than 5% error). Thus, to further support her claim, CL performed additional trials at different temperatures, as shown. T, K Calculated Ksp 303.15 from previous experiment 323.15 4.61 x 10-12 283.15 1.19 x 10-¹¹ C. Give the equation of the best fit line (with r²) for the corresponding van't Hoff plot. D. Calculate the experimental Ksp of the unknown salt at 298 K.

A technician mixes 0.10 L of 0.10 M NaCl with 0.30 L of 0.20 M AgNO3. Which of the following statements is correct? Ksp = 1.6 × 10-10 for AgCl.   Question 47 options:   1)  The solution is at equilibrium.   2)  The solution is not at equilibrium and no precipitate will form.   3)  AgCl will dissolve until the solution is saturated.   4)  AgCl will precipitate until the solution is saturated.   5)  None of above.

A solution contains 8.49×10M sodium carbonate and 9.73×10 M potassium hydroxide. Solid calcium nitrate is added slowly to this mixture. What is the concentration of carbonate ion when hydroxide ion begins to precipitate? [carbonate] = M

A solution contains 1.03×10 M sodium cyanide and 8.68×10M potassium sulfate. Solid silver nitrate is added slowly to this mixture. A. What is the formula of the substance that precipitates first? formula = B. What is the concentration of silver ion when this precipitation first begins? [Ag*] =[ M

A solution contains 5.35x10-³ M sodium hydroxide and 1.31x10-² M potassium sulfide. Solid iron (III) acetate is added slowly to this mixture. A. What is the formula of the substance that precipitates first? formula B. What is the concentration of iron(III) ion when this precipitation first begins? [Fe³+] = M

Solid sodium hydroxide is slowly added to 125 mL of a 0.0449 M chromium(III) acetate solution. The concentration of hydroxide ion required to just initiate precipitation is  M.

A solution contains 1.13×10-² M nickel(II) acetate and 7.82x10-3 M zinc nitrate. Solid potassium cyanide is added slowly to this mixture. A. What is the formula of the substance that precipitates first? formula = B. What is the concentration of cyanide ion when this precipitation first begins? [CN] = M

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A solution contains 1.23x10-2 M ammonium sulfite and 8.98x10-3M potassium carbonate. Solid barium acetate is added slowly to this mixture. A. What is the formula of the substance that precipitates first? formula = B. What is the concentration of barium ion when this precipitation first begins? [Ba2") = M