0
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.
Add your answer:
Earn +20 pts
Why is it necessary to acidify iron with h2so4 during redox titration?
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.
Why acid is added to iron ammonium solution before titration?
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.
Why do we heat KSCN Fe solution befor titration with EDTA?
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.
What is the function of NH4CNS in titration?
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.
How do they use redox titration in real-world application?
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.
How much iron does spinach have?
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.
Why did popeye need iron in his spinach?
Spinach is naturally high in iron....so when Popeye ate spinach, he became stronger.
Why is spinach good for you?
Spinach is rich in iron to start with.
What has more iron cooked spinach or tossed salad?
cooked spinach
What is the best food for getting Iron?
Spinach is high in iron.
What are the foods high in iron?
Spinach
What foods are the best in iron?
Spinach
Why is it necessary to acidify iron with h2so4 during redox titration?
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.
What vegetable is called the iron mine?
Spinach
What are the best foods high in iron?
Spinach
What did popeye get from his spinach?
Spinach is noted for its iron content, and it gave Popeye incredible strength and stamina.
Which part of spinach is eaten?
Leaves are eaten in spinach. These are fleshy, green and contain lots of iron.
