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- 112. Solutions of sodium thiosulfate are used to dissolve unexposed AgBr (Kp and-white film. What mass of AgBr can dissolve in 1.00 L of 0.500 M Na,S,O;? Ag* reacts with S,O,- to form a complex ion: = 5.0 × 10-13) in the developing process for black- Ag*(aq) + 2S,O;²-(aq) = Ag(S,O;),-(aq) K = 2.9 X 1013(12) V. Consider the titration of a 25.0-mL sample of 0.175 M CH3NH2 (Kb = 4.40 x 104) with 0.150 M HBr. What is the pH of the solution after 10.0 mL of the acid have been added? What is the pH at the equivalence point?The solubility-product constant for Ce(IO3)3 is 3.2 x 10-10. What is the Ce³+ concentration in a 3- solution prepared by mixing 40.00 mL of 0.0410 M Ce with 40.00 mL of a. water? b. 0.0410 MIO3¯? c. 0.250 M IO? M M M
- 1. Commercial vinegar was titrated with NaOH solution to determine the content of acetic acid, CH3COOH. For 20.0 cm3 of the vinegar, 26.7 cm3of 0.60 mol dm-3 NaOH solution was required.What was the concentration of acetic acid in the vinegar if no other acid was present? (Thanks for your help) A. 0.45 mol dm-3B. 0.60 mol dm-3C. 0.80 mol dm-3D. 1.60 mol dm-35.) What CrO4² concentration is required to initiate precipitation of Ag2CrO4 from a solution that is 0.0125 M in Ag*? (Ksp= 1.2 x 10-12) %3DA solution contains anions with the following concentrations: 0.20 M CO, and 0.01 M Cr If a dilute AGNO3 solution is added to this solution, which is the first compound to precipitate? O a. None of the responses O b. Ag;CO; (Kap = 1.2 x 1012) %3D O C AGCI (K, = 1.8 x 10-19) O d. Both compounds will precipitate at the same time
- 6. a). Calculate the solubility in moles/L for Mg(OH)2 in pure water. Ksp = 5.6 x 10-12 b). Calculate the solubility in moles/L for Mg(OH)2 in a solution that contains 0.200 M NaOH.Please use the values in the resources listed below instead of the textbook values. Perform the following calculations involving concentrations of iodate ions. (a) The iodate ion concentration of a saturated solution of Ce(IO3)4 was found to be 7.35X10 mol/L. Find the Ksp: 4.0 (b) Find the concentration (in M) of iodate ions in a saturated solution of Ra(IO3)2. (Ksp = 1.16X 10-9) 4.0) MQ1) In titration of the solution containing 0.1 Molar of l'and 0.1 Molar of Cro, with the solution of 0.1 molar of Ag+, what is the titration error in first step? If the end point of first titration will be taken on the precipitation of Ag:CrO4 KSP(Ag:Cro.)=10n KSP(Agl) = 10 161
- A solution contains 0.10 M Sr(NO₂)₂ and 0.20 M Bi(NO₂). When solid Na AsO is 2 added to the solution which salt will precipitate first? Ksp of Sr₂(AsO₂)₂ = 4.29 x 10-1⁹ and BiAsO = 4.43 x 10-1⁰ 2 4 A) NaNO, B) Sr₂(ASO), C) BIASO D) None of theseA 1.455 g sample contain thiourea (NH,)2CS (76.12 g/mol) was extracted into a dilute H,SO, solution and titrated with 37.31 mL of 0.009372 M Hg* according to the following reaction 4(NH,),CS+Hg*> [(NH,),CS] Hg Calculate the %((NH,),CS in the sample? , 1. O1.829 % 2. 07.317 % 3. 098.45 % 4. 045.44 % Previous Next hp4) A redox titration: 20.00 mL of 0.00500 M Sn²+ solution was titrated with 0.0200 M Ce+*+ according to the reactio below. Titration reaction: Burst coreaning Co Ce4+ + e-------> Ce³+ Sn²+ + 2e ------> Sn²+ appy 0.00500 M Sn Calomal Pt wire Magneto stirring bar 2 Ce4+ + Sn²+ --> 2 Ce³+ + Sn¹+ Eº 1.470 V 0.139 V a) What is VE (the equivalence volume) (of Ce4+) needed to reach the endpoint? b) Calculate the potential (voltage) relative to SCE, when 5.00 mL Ce4+ is added. SCE = +0.241 V