Zinc uranyl acetate, Magnesium uranyl acetate and Cobalt uranyl acetate, forms insoluble salts with sodium. Among these three acetates of sodium, which is the most suitable form for qualitative testing of sodium? O Mg Uranyl Acetate O Co Uranyl Acetate All are suitable. O Zn Uranyl Acetate
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- وام اول 1) 25 mL Ag No3 react with 5mM Nacl ý 35 ml of (AgNez ) silver Solution is required to titrate ZnClz are present inthe Sample: 2) Calculate the amount of lime( Ca0) that Gon be prepared by heating 200kg of limestone that is 95% Pure Cacos M.Wt. aCo3=lo0 M.wt Cao-56-1 Ca Co3 » Cao+ Co 3) What Volume of 12M and 3M HCl must be mixed to give $ 1 liter of 6M HCl 4) Cal Culate the molar Concentrationof acetic acid Solution which is z% ionized. 5) GI Culate he PHofu Sdution which results from the mixind of 50.0ml of o SM HCl which 5omL of o.4M NH3. ) CalCulate the extent of hydrolysis in a o.ol M Solutio-A sample may contain NaOH, NazCO3 and NaHCO3, alone or in some combination, along with inert material. A samplewitha mass of 857.6 mgwas dissolved and titrated with0.1163 M HCI. The volume of HCl used from 0 to methyl red endpoint (Phenolphthalein endpoint was not monitored here) was found to be 36.54 mL. Another 228.8 mg portion of the sample was titrated to the phenolphthalein endpoint and 10.82 mL was used up for this titration. a. What is the composition of the sample? b. Calculate the percentage of each of the component present.Consider the titration curve for the titration of 1.0 L of 1.00 M H3ASO4 with 1.00M NAOH. What is the pH of the solution when 1.7 L of NaOH is added? Data for H3ASO4: K31 = 6.0x10-3, K22 = 2.0x10-7, Ka3 = 3.0x10-12 %3D %3D pH < 2.22 2.22 pH < 4.46 4.46 < pH < 6.70 O 6.70 < pH < 9.11 9.11 pH < 11.52 11.52 < pH
- Zinc uranyl acetate, Magnesium uranyl acetate and Cobalt uranyl acetate, forms insoluble salts with sodium. Among these three acetates of sodium, which is the most suitable form for qualitative testing of sodium? Mg Uranyl Acetate Co Uranyl Acetate All are suitable. Zn Uranyl AcetateThe graphic below shows the general procedure for titrating the saturated solution of magnesium hydroxide with hydrochloric acid. Select all of the true statements from the choices below. 1. Obtain a saturated solution of magnesium hydroxide. 0 2. Transfer 30.0 mL to an Erlenmeyer flask using a volumetric pipet. Add phenolphthalein. 3. Titrate to a colorless endpoint using 0.0020 M hydrochloric acid. It is important that the aliquot drawn in step 2 does not contain undissolved magnesium hydroxide solid. For titrations of the saturated solutions at elevated temperatures, the solution must be held at high temperature for the duration of the titration. Hydrochloric acid is the analyte in this titration. The volume of liquid in the buret should be read before and after the titration. At the endpoint of the titration, the solution will turn from colorless to pink.Explain why K2CrO4 is used as an indicator in Argentometric titration?
- Answ 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 InsWhat weight of strontium acetate containing 99% Sr(CH3COOH)2.½H2O must be used as sample in an assay according to the general method for alkali salts of organic acids if, after treatment of the ash with 50.00 ml of 0.5162 N hydrochloric acid, it is desirable to consume 30.00 ml of 0.4675 N sodium hydroxide in the back titration?A 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.
- A pink solid has the formula CoCl3 5NH3 H2O. A solution of this salt is also pink and rapidly precipitates 3mol AgCl(s) on titration with silver nitrate solution. When the pink solid is heated, it loses 1mol H2O to give a purple solid with the same mole ratio of NH3:Cl:Co as the pink solid. The purple solid releases two of its chloride ions rapidly; then on dissolution and titration with AgNO3, release one of its chloride ions slowly. Deduce the structures, draw and name 2 octhahedral complexesWhat will be the appropriate pH of a buffer prepared by mixing 100 ml of 0.1 M Na2HPO4 and 100 ml of 0.1 M NaH2PO4? (For H3PO4, pKa1 = 2.1; pKa2 = 6.8; pKa3 = 12.5) Ans in 2 significant figuresCommercial phosphate buffers are sold to maintain fish tanks at a pH of 7. Use a table of acid dissociation equilbrium constants to find all the K, values for H, PO,. AjA BIUS Calculate the pka values from the Ka values. Remember that pX = -logX. pKi = pK = pk3 = What two chemical species are primarily found in solution in a phosphate buffer with a pH of 7? о Н РО, аnd PО H,PO, and HPo HPO; and PO- о Н РО, and H,РО,