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16. Question 3 (6 Points): What is the pH of 0.5 M solution of Chromium(III) chloride...
Page 3 An electrochemical is prepared from a chromium metal electrode in contact solution of 0.500 M chromium (III) nitrate and a standard hydrogen half-cell elect The two half cells are connected by a porous disk or a KCl salt bridge. Standard Reduction Potentials at 298 K Cr+ (aq) + 3e ----> Cr(s) Cr+ (aq) + e ----> Cr2+ (aq) E° = -0.740 V E° = -0.440 V a) Write the reaction for the cell and calculate the standard free...
What is the pH of a solution prepared by dissolving 5.00 g of Ba(OH)2 in 5.00 liters of water. Assume no volume change after BOH)2 added. (MM of Ba(OH)2 - 171 g/mol). pH = 2.23 pH = 12.43 pH = 11.77 pH = 12.07 pH = 10.60 QUESTIONS A solution is prepared by adding 0.10 mole of sodium fluoride, Naf, to 1.00L of water. Which statement about the solution is true? The concentration of fluoride ions and sodium ions in...
34. Chromium(III) hydroxide has Ksp 1.6 x 10-30. What is the molar solubility of Cr(OH)3 in a solution whose pH is maintained at 6.00? (A) 1.6 x 10-12 mol L-1 (C) 3.6 х 10-8 mol L-1 (B) 1.6 x 10- mol L-1 (D) 1.6 x 106 mol L-1 35. At 400 K, this reaction has Kp- 8.2 x 10. SO3(g)SO2(g)/ 02(g) What is Kp at 400 K for the following reaction? 2 SO3(g) 2 SO2(g) + O2(g) (B) 8.2 x...
$. (0.5 pt) Complete this table. The choices are: SA for strong acid, WA for weak acid, SB for strong base, WB for weak base, N for płH neutral species. The first line is done as an Chemical Formula of species CHjCH COOH Sr(OH)2 KCl le How does it act in water? Why/how? WA (recognize the-COOH carboxylic acid group) HBr Fe (aq) CHjNH2 9.(0.8 pt) A buffer is prepared from 0.0250 M acetic acid and 0.0500 M sodium acetate. Calculate...
3. To make a buffer solution, you can start with a solution of a known number of moles of the base form (A) and add a strong acid until you have neutralized the correct number of moles of the base to have the correct A HA ratio for the buffer you require. For the example using HF in the background information: a. How many moles of the base form (A) are required to start? HINT: The acid form (HA) will...
6 6. Zinc hydroxide, Zn(OH)2. is practically insoluble in pure water. (Kap 3.0 x 10-16) a) Determine the pH of a saturated aqueous solution of Zn(O1H)2. (You should assume that all hydroxide ions in the solution come from the Zn(OH)2: you can ignore the autoionization of water.) (4 pts) b) Zn(OH)2 is less soluble in even very dilute solutions of Zn(NOs)2 due to the common ion effect. Determine the molar solubility of zine hydroxide in a 1.0 x 10-4 M...
Question 10 0/5 points A buffer solution is made such that the initial concentrations of lactic acid (HC3H5O3) and the lactate ion (C3H503) are both 0.600 M. What is the resulting pH if 0.020 mol of hydrochloric acid is added to 0.500 L of the buffer solution? (The Ky of HC3H5O3 is 1.4 x 10" 4.) HINT: Use your RICE chart! [A-] Note: pH = pka + log [HA] Ka x Ky = Kw = 1.0 x 10-14 2.92 3.80...
1. If your original unknown is colorless, what ions are absent
from your unknown?
2. If you get no precipitate with just the 6 M NH3 in step B,
what ions are absent from your unknown?
pls help are my answers correct ty
17 Page 4 Aperiment 24. Qualitative Analysis Group III-NI, Mn, Fe, Al, Cr, Zn 1. PROCEDURES A. Observations of Samples. Obtain an unknown and record code. Observe color of unknown solution Common color correlations are: dark blue...
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Question 10 Tries remaining 3 Points out of 100 P Flag question What is the pH of a 10.1 M solution of H2SO4? The first proton completely dissociates the K, for the second proton is 1.2x10-2 Answers must be accurate to 2 decimal places. Multiple tries are permitted; however, 20% (1/5) point will be deducted for each incorrect response.
A buffer solution is able to maintain a constant pH when small amounts of acid or base are added to the buffer. Consider what happens when 1 mL of a 5 M solution is added or 0.005 mol of HCl are added to a 100.0 mL solution acetic acid buffer that contains 0.0100 mol of Acetic acid, HC,H,O,, and 0.0100 mol of sodium acetate, NaC,H,O,. The initial concentration of both the acid and the base are 0.0100 mol/ 0.1000 L...