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explain the importance of iodometric titration methods for the determination of iodine content in salt.
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- Give a proposal for the purification of Cobalt(II)sulphate CoSO4.7H2OExplain why colour of KMnO4 disappears when oxalic acid is added to its solution in acidic medium.Is there a difference when the needle or metal clip is placed on the surface of distilled water with dilute amounts of liquid detergent? Explain your observations in terms of the strength of IMFA present in each condition.
- Write the chemical equation for the addition of MnSO4 and alkali-iodide-sodium azide in the water sample and identify the chemical identity of the white precipitate formed after the addition.discuss the importace and methods of solid liquid separation processes of hydro metallurgywhat is the purpose of preparing of a standard sodium hydroxide solution in determination of purity of impure KHP?
- Explain how you would analyse Fe(OX).2H2O for iron and oxalate if you were provided with a standardised solution of potassium permanganate, dilute sulphuric acid and zinc dust.In determination of mixed alkali, does adding H2O to the analyte can afect the process of titration?How and what is the mechanism by which crystal structure of the mineral is altered by calcination , which in turn can impact its surface acidity. What happens when a crystal structure changes and why does it affect surface acidity?
- Sometimes it is not possible to indicate the end point of a titration.a) How can one proceed then and what is the name of the type of titration that can be performed? Briefly describe. An example in which this method can be used is in the determination of mercury, which forms strong complexes with EDTA, but for which there is no suitable indicator that can indicate the end point. b) You are given the task of determining the Hg2 + concentration in a sample solution? After adding an excess of EDTA, the sample solution is titrated with a magnesium solution. 20.00 ml of a 0.0452 M EDTA solution was added to 30.00 ml of sample solutionThe excess EDTA was determined by adding 0.0500 M Mg 2+ solution, consuming 4.37 ml to the end point.Explain why ionic attractions are weaker in media with high dielectric constants, e. g.,water and aqueous buffers.What is the importance of non-aqueous titrations in pharmaceutical analysis?