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Investigating The Content of Tannin in Tea Affected by Steeping Time Using a Colorimeter - Chemistry IA exemplar scored 3

Investigating The Content of Tannin in Tea Affected by Steeping Time Using a Colorimeter

How does temperature (ranging from 10℃ to 50℃) affect the rate of the iodine clock reaction, and what is the relationship between temperature and reaction rate? Specifically, how can the reaction rate be determined from the time taken to reach the blue-black endpoint, and how can this data be analysed using the Arrhenius equation to estimate the activation energy of the reaction? - Chemistry IA exemplar scored 5

How does temperature (ranging from 10℃ to 50℃) affect the rate of the iodine clock reaction, and what is the relationship between temperature and reaction rate? Specifically, how can the reaction rate be determined from the time taken to reach the blue-black endpoint, and how can this data be analysed using the Arrhenius equation to estimate the activation energy of the reaction?

Investigating how increasing temperatures of water (40°C, 50°C, 60°C, 70°C, 80°C, 90°C, 100°C) in which cloves are steeped affect the concentration of quercetin, measured by a spectrophotometer - Chemistry IA exemplar scored 5

Investigating how increasing temperatures of water (40°C, 50°C, 60°C, 70°C, 80°C, 90°C, 100°C) in which cloves are steeped affect the concentration of quercetin, measured by a spectrophotometer

What is the effect of the cooking temperature (10, 30, 60, 80, 100 ºC) of Brassica rapa subsp. chinensis on its content of calcium ions (mg), as measured by the titration volume of 0.01M EDTA (Ethylenediaminetetraacetic acid) required to completely react with calcium (II) ions in a solution of Brassica rapa subsp. chinensis after cooking it for 5 minutes? - Chemistry IA exemplar scored 6

What is the effect of the cooking temperature (10, 30, 60, 80, 100 ºC) of Brassica rapa subsp. chinensis on its content of calcium ions (mg), as measured by the titration volume of 0.01M EDTA (Ethylenediaminetetraacetic acid) required to completely react with calcium (II) ions in a solution of Brassica rapa subsp. chinensis after cooking it for 5 minutes?

As determined by the reaction rate constant, which catalyst from baker’s yeast, baking powder, and manganese (IV) oxide is the most effective at catalyzing the decomposition of 3% hydrogen peroxide? - Chemistry IA exemplar scored 7

As determined by the reaction rate constant, which catalyst from baker’s yeast, baking powder, and manganese (IV) oxide is the most effective at catalyzing the decomposition of 3% hydrogen peroxide?

Investigation into how varied temperature (20℃, 30℃, 40℃, 50℃, 60℃, 70℃) affect the bleaching capacity of
sodium hypochlorite in removing protein-based stains (egg-yolk) from 100% cotton fabric, measured by the ΔE value
obtained using the Color Identifier Colorimeter app? - Chemistry IA exemplar scored 6

Investigation into how varied temperature (20℃, 30℃, 40℃, 50℃, 60℃, 70℃) affect the bleaching capacity of sodium hypochlorite in removing protein-based stains (egg-yolk) from 100% cotton fabric, measured by the ΔE value obtained using the Color Identifier Colorimeter app?

To what extent do different temperatures (29℃, 37℃, 45℃) affect the aspirin (acetylsalicylic acid) concentration during reaction with stomach acid (HCl)? - Chemistry IA exemplar scored 5

To what extent do different temperatures (29℃, 37℃, 45℃) affect the aspirin (acetylsalicylic acid) concentration during reaction with stomach acid (HCl)?

How does varying the concentration of Iron(III) chloride affect the rate of hydrogen peroxide decomposition? - Chemistry IA exemplar scored 4

How does varying the concentration of Iron(III) chloride affect the rate of hydrogen peroxide decomposition?

What is the effect of aqueous NaCl concentration increase (0.5%, 1%, 3.5%, 5%, 10%) on the mass loss of iron? - Chemistry IA exemplar scored 5

What is the effect of aqueous NaCl concentration increase (0.5%, 1%, 3.5%, 5%, 10%) on the mass loss of iron?

How does the temperature (50.0,60.0,70.0,80.0,90.0 °C) of Acetylsalicylic acid synthesis
from Salicylic Acid and Acetic anhydride affect its % yield and purity (determined by the Iron
(III) Chloride test and the melting-point of the Acetylsalicylic acid crystals)? - Chemistry IA exemplar scored 5

How does the temperature (50.0,60.0,70.0,80.0,90.0 °C) of Acetylsalicylic acid synthesis from Salicylic Acid and Acetic anhydride affect its % yield and purity (determined by the Iron (III) Chloride test and the melting-point of the Acetylsalicylic acid crystals)?