Condition of permanganatometric titration of sodium oxalate includes: pH = 1 and heating of analyte solution till 70° C; pH = 7 and heating of analyte solution till 70° C; pH = 10 and heating of analyte solution till 70°C; pH = 1 under room temperature; %3D
Q: A mixture containing only KCl and NaBr is analyzed by the Mohr method. A 0.3172-g sample is…
A: Concentration: It is the ratio of number of moles of solute dissolved in per litre of solution.
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A: Dear student I have given answer to your question in the image format.
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Q: Report the %w/w KCl and NaBr in the sample.
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Q: When treated with a solution of ammonium sulfate an unknown solution produced heavy white…
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Q: Report the %w/w KCl and NaBr in the sample.
A: %w/w is used to calculate the concentration. formula, %w/w=mass of element in gramsmass of sample…
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- Calculate the solubility of calcite in water in contact with a soil atmosphere containing CO2 at the partial pressure of 0.1 bar, and find the pH of the saturated solutionState the limits to the generality of the expression for estimating the pH of an amphiprotic salt solution. Suggest reasons for why these limitations exist.The dissociation vapour pressure (the pressure of gaseous products in equilibrium with the solid reactant) of NH4CI at 427 °C is 608 kPa but at 459 °C it has risen to 1115 kPa. Calculate (a) the equilibrium constant. (b) the standard reaction Gibbs energy, (c) the standard enthalpy, (d) the standardentropy of dissociation, all at 427 °C. Assume that the vapour behaves as a perfect gas and that ΔHΘ and ΔSΘ are independent of temperature in the range given.
- You have a solution that contains acetic acid, (CH3COOH or HAc). The concentration of acetic acid in the aqueous solution is 0.35 mol / dm3. Ka = 1.7378 x 10 ^ -5 M a. Calculate the pH of the solution. 15 cm 3 of the acetic acid solution was titrated with sodium hydroxide solution, NaOH (aq), at a concentration of 0.5 mol / dm3 b. Describe how you would proceed to perform a titration of an acid of unknown concentration. What information can be obtained from a titration, describe the different phases. c. How much NaOH will be added when the equivalence point occurs?The molar conductivity of 0.010 M CH3COOH(aq) is 1.65 mS m2 mol-1. What is the acidity constant, Ka, of the acid?A test tube contains the following chemical equilibrium: N2O4(g) + 59 kJ ⇌ 2NO2(g). You notice that the colourless contents of the test tube turn brown. Provide two realistic reasons as to why this change would occur in a laboratory setting. Support claims with evidence from course concepts
- Describe in detail the steps involved to prepare following solution; a) 0.2% (v/v) , (v/w), (w/v) and (w/w) solution of acetic acid.The chief chemist of the Brite-Metal Electroplating Co. isrequired to certify that the rinse solutions that are discharged from the company’s tin-plating process into the municipal sewer system contain no more than 10 ppm (parts per million) by mass of Sn2+. The chemist devises the following analytical procedure to determine the concentration. At regular intervals, a 100-mL (100-g) sample is withdrawn from the waste stream and acidified to pH = 1.0. A starch solution and 10 mL of 0.10 M potassium iodide are added, and a 25.0-mA current is passed through the solution between platinum electrodes. Iodine appears as a product of electrolysis at the anode when the oxidation of Sn2+ to Sn4+ is practically complete and signals its presence with the deep blue color of a complex formed with starch. What is the maximum duration of electrolysis to the appearance of the blue color that ensures that the concentration of Sn2+does not exceed 10 ppm?Sodium acetate, NaCH3CO2, of mass 7.4 g is used to prepare 250 cm3 of aqueous solution. What is the pH of the solution?
- For biological and medical applications it is often necessary to consider proton transfer equilibria at body temperature (37 °C). The value of Kw for water at body temperature is 2.5 x 10-14 (a) What are the va lue of [H3O+) and the pH of neutral water at 37 °C. (b) What is the molar concentration ofOH- ions and the pOH of neutral water at 37 °C?Write the balance equation of aqueous Pb(ClO3)2 with NaI. Include phases.The SO2 present in air is mainly responsible for the phenomenon of acid rain. The concentration of SO2 can be determined by titrating against a standard permanganate solution as follows: 5SO2 + 2MnO4- + 2H2O ---> 5SO42- + 2Ms2 + 4H+ Calculate the number of grams of SO2 in a sample of air if 4.90mL of 0.00700M KMnO4 solution are required for the titration. Be sure your answer has the correct number of significant digits.