I have lab like this. So, the question is if the sample of unknown K2C2O4 compos

Question

I have lab like this. So, the question is if the sample of unknown K2C2O4 composition was not mixed well during preparations before the titration, how would this effect my results?

uun useu IH your notebook. Il. Titration of Sample of Unknown K,C,0s composition with KMnO Solutions ILa. Precisely weigh out about 1 g of one of the oxalate unknowns labeled Unknown A Unknown B or Unknown C (your TA will assign your unknown letter). Record which unknown you are using in your notebook. Transfer the solid to a clean 125 mL Erlenmeyer flask, add a magnetic stirbar, 25 L of water and SLOWLY add 25 mL of 3 M H2SO4 solution. The solution will fizz, so be careful not to add the acid quickly and cause an overflow IL.b. Start the stirbar spinning and gently warm the solution to about 50 °C. Refill the buret with KMnO4 solution, and titrate the K2C204 unknown with the KMn04 solution. The oxalate and permanganate reaction is very slow as they are large molecules. When the color persists for 1 minute, the endpoint has been reached. Record the volume used to reach the endpoint. ILc. Repeat the titration on a second and third sample of the same unknown. Record the mass of the sample and volume of titrant used each time.

Explanation / Answer

A titration is dependent on the concentration of the solutions involved in that titration. Since, we keep a check on the volume of the solutions to determine the concentration.

concentration in terms of Molarity is number of moles of the solute per litre volume of the solvent.

if the solute is remained undissolved in the solution, that will hamper the concentration of the solution and that furthermore affects the volume values of that particular titration which will result in a errored value of the equivalence point.

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