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- 7) what is the pH at the equivatent point in the titration of 5 mmol Potassium acid phthalate dissolved in 100 mel of water and titrat ed with 0.tM NaoH 9 k,= 4 tr56 %3D Ans.: 8.16O7) what is the pH at the equi valent point in the titration of 5 mmol Potassium acid phthalate dissolved in 100 m of water and titrat ed with o.1 M NaoH I K.= 4 ero6 Ans.: 8.46Which compound has the lowest molar solubility in pure water at 25 °C? ZnS; Ksp = 2.0x10-25 %3D O CoS; Ksp = 5.9x10-21 O PbS; Ksp = 3.2x10-28 %3D O CuS; Ksp 7.9x10-37
- a. What cations may be present in a pale blue solution that turns deep blue and forms a white precipitate upon 6M NH3(aq)? b. A white solid dissolves in water to form a neutral solution. No precipitate forms when the solution is treated with a solution of NH4Cl/ NH3 buffer, nor when (NH4)2S is added. When the solution is acidified with HC2H3O2 and K2CrO4 is added a yellow precipitate forms. This precipitate dissolves upon addition of concentrated HCl. Acidification of a solution of the solid with HNO3 followed by addition of AgNO3 causes formation of a white precipitate. What is the identity of the original solid?8:04 PM Fri Nov 27 ll7 43% AA A sjc.cengagenow.com + Latest Line F5 Dynamic... Group Resea... 10-16 Acid-.. Mastery 10-16 X OWLV2 | Onli... G green and w... C dept. C SIERRA SIERRA SIERRA Module 10-12 [Review Topics] [References] 1. Buffer Solu... Use the References to access important values if needed for this question. A buffer solution is made that is 0.376 M in HCN and 0.376 M in 2. Buffer S... 2req Question NaCN. Question If Question Ka for HCN is 3. Buffer Solu... M) -10 4.00 x 10-, what is the pH of the buffer solution? pH : Write the net ionic equation for the reaction that occurs when 0.089 mol HCl is added to 1.00 L of the buffer solution. the lowest pos coefficients. Omit states of matter. Use H3 0t instead of Ht) + + Submit Answer Retry Entire Group 8 more group attempts remaining Progress: 2/3 groups Due Nov 28 at 11:55 PM Previous Next Finish Assignment Save and ExitA silver nitrate soluti on contains 14.77 g of primary standard AGNO3 , in 1.00 L what volume of this solution is needed toreact completely with 50.00 ml. of 0.01808 M Na2S. 1. O10.40 ml. 2. O 20.79 ml. 6.10 ml. 4. O12.31 ml. 5. O18.21 ml. 3.
- O7) what is the pH at the equivalent point in the titration of 5 mmol Potassium acid phthalate dissolved in 100 d of water and titrated with o.1M NaOH 9 K,= 4 +r06 Ans.: 8.96Which of the following salts gives the following Ksp expression? Ksp = 108s5 a. Sn(OH)4B. Cu2C2O4c. Cu3PO4d. Al2(CO3)3Answ GA 20. Answ My C X C Write C The F X C Whe x akeCovalentActivity.do?locator=assignment-take [Review Topics] [References) Use the References to access important values if needed for this question. When 25.0 mL of a 1.99×104 M lead nitrate solution is combined with 15.0 mL of a 6.28×10-4 M sodium iodide solution does a precipitate form? (yes or no) For these conditions the Reaction Quotient, Q, is equal to Submit Answer Retry Entire Group 1 more group attempt remaining क Ni ENG US Home End Ins
- Q7) what is the pH at the equivatent point in the titration of 5 mmol Potassium acid ph thalate dissolved in 100 m of water and titrat ed with o.1M NaoH 9 Ka= 4 tr06 Ans. : 8.16Calculate the concentration of CaHAO4 : a. In o solution which Is 0.020 M solutlon of H,CsH&O4. b. in a solution which is 0.020 M with respect to H;CH4O4 and 0.040 M with respoct to HCI.46). Calculate the solubility of Pbl2 in a solution that already contained 0.10 M Nal. Ksp 3D 9.8 х 109 а. 4.95 х 108 М d. 4.95 x 10-5 M b. 9.8 x 10-7 M e. none of the above c. 9.8 x 108 M.