Willpower of Cobalt Oxalate Hydrate

 Determination of Cobalt Oxalate Hydrate Composition

Determination of Cobalt Oxalate Hydtrate

Introduction

The objective of this laboratory is for college students to determine the percentage of cobalt oxalate moisturizer using the gravimetric analysis. They will do a redox titration to look for the percentage of oxalate in the compound. After the percentages will be calculated, you will determine the percent water by the difference of Oxalate and Cobalt from %100. Procedure

Perseverance of Cobalt

1 . Ponder 0. several g of solid co (symbol) oxalate hydrate (from lab 8) over a balance then place it within a preweighed crucible. 2 . Put the crucible on the hot dish, and temperature the crucible until the substance turns dark. 3. In that case allow the compound to awesome inside the crucible, and think about the remains inside the crucible. (This will give the mass percent of cobalt. ) 4. Replicate all these measures again, to get the results for Trial 2 . Willpower of Oxalate

1 . Think about 0. 15g of Cobalt oxalate hydrate, and place that in a 250mL Erlenmeyer flask. 2 . Put 25ml of 1M H2SO4 solution to the flask

3. Place the flask on a sizzling plate, mix to reduce the chemicals in the flask, heat the perfect solution is until it gets to 60 C. 4. Then simply titrate the perfect solution with Potassium permanganate, wait for a color difference in order to identify the end stage. 5. Do it again all these steps again, to acquire the effects for Trial 2 . Data/Results

Perseverance of Co (symbol)

Trial 1Trial 2

Mass of Crucible and Cobalt Oxalate20. 245g19. 721g

Mass of Crucible19. 945g19. 421g

Mass of Cobalt Oxalate0. 30g0. 30g

Mass of Crucible and Residue19. 95g19. 87g

Mass of Crucible19. 945g19. 721g

Mass of Residue0. 149g0. 131g

% Co in Cobalt Oxalate37. 0%43. 6%

Average % Co40. 3%

Determination of Oxalate

Mass of Pot and Co (symbol) Oxalate128. 44128. 44

Mass of Container128. 296128. 296

Mass of Cobalt Oxalate0. 1560. 151

Final examining of KMnO4 buret31. 70mL30. 70mL

Preliminary reading of KMnO4 buret50. 00mL50. 00mL

Volume of KMnO4 solution required18. 30mL19. 30mL

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