1. wiegh approximately 15g of spinach
2. using scissors, cut the leaves into small pieces and place in a 250cm3 beacker ( if frozen simply place in beacker)
3. using a measuring cylinder, add 50cm3 1.0 moldm-3 sulphuric acid ( CARE irritant) and boil the mixutre gently for 5 mins
4. allow mixture to cool then filter it, using a buchner funnel and vacuum filtration . wash the residue in the funnel one with a little distilled water to collect all the filtrate
5. pour all the filtrate and washing s into a 100cm3 volumetric flask. make up to 100cm3 with 1.0moldm-3 sulphuric acid. stopper the flask and shake it well.
6. fill the burette with potassium manganate (VII) solution (CARE stains cloths)
7. using a pippette transfer 10cm3 of the spinach extract solution to the 250cm3 conical flask and add 50cm3 of 1.0 moldm03 potassium manganate (VII) solution from the burrette until pink colour persists for 30 seconds.
lol i hope that helps lol
To extract iron from spinach, the leaves need to be boiled in acid to release the iron ions. The solution is then filtered to remove solid particles and the iron content is determined via titration with a known concentration of a chelating agent like EDTA. The endpoint of the titration is reached when the chelating agent binds to all the iron ions, forming a colored complex.
Acidifying iron with H2SO4 during redox titration helps in preventing the hydrolysis of iron(III) ions, which can form insoluble hydroxides and interfere with the titration results. The acid medium also helps to ensure that the redox reaction between the iron and the titrant is carried out effectively and selectively.
Acid is added to the iron ammonium solution to lower the pH and prevent the hydrolysis of iron ions, which can affect the accuracy of the titration results. Acid also helps dissolve any precipitates that may form during the titration process, ensuring a clear and accurate endpoint.
Heating the KSCN Fe solution before titration with EDTA helps to break down any complex formations involving iron and potassium thiocyanate. This ensures that the titration accurately measures the amount of iron present in the solution by allowing EDTA to chelate with the iron ions more effectively.
NH4CNS (ammonium thiocyanate) can be used as an indicator in titrations involving iron(III) ions, where it forms a blood-red complex with iron(III) ions. This complex can be used to indicate the endpoint of the titration when the iron(III) ions have been completely reacted with the titrant.
Redox titration is commonly used in chemistry laboratories to determine the amount of a specific substance in a solution by measuring the amount of electrons transferred during the titration process. This method is used in various industries such as pharmaceuticals, environmental monitoring, and food and beverage production for quality control and analysis purposes.
A half cup of raw spinach has about 0.4 mg of iron and a half cup of cooked spinach has about 6.4 mg.
Spinach is naturally high in iron....so when Popeye ate spinach, he became stronger.
Spinach is rich in iron to start with.
cooked spinach
Spinach is high in iron.
Spinach
Spinach
Spinach
Spinach
Acidifying iron with H2SO4 during redox titration helps in preventing the hydrolysis of iron(III) ions, which can form insoluble hydroxides and interfere with the titration results. The acid medium also helps to ensure that the redox reaction between the iron and the titrant is carried out effectively and selectively.
Leaves are eaten in spinach. These are fleshy, green and contain lots of iron.
Spinach is noted for its iron content, and it gave Popeye incredible strength and stamina.