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To increase solubility product constant by complexation

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What are the common error in a gravimetric analysis lab?

Common errors in a gravimetric analysis lab include incomplete precipitation of the analyte, contamination of the sample, loss of analyte during filtration or washing, and improper drying of the precipitate. These errors can result in inaccuracies in the final weight of the analyte and affect the overall precision and accuracy of the analysis.


How do you determine the sulphate?

Sulphate ions can be determined using methods such as gravimetric analysis, titration with barium chloride, or ion chromatography. In gravimetric analysis, sulphate ions are precipitated as barium sulphate and weighed. Titration with barium chloride involves adding a known volume of barium chloride solution to the sample containing sulphate ions, and the excess barium chloride is back-titrated with a standard solution of a titrant such as potassium chromate. In ion chromatography, separation and quantification of sulphate ions are done using a chromatographic column with specific properties.


How dangerous is beta carotene?

Beta-carotene is not dangerous but an excess must be avoided - a risk of hypervitaminose A exist.


Why hcl used in the limit test of sulphates?

Hydrochloric acid (HCl) is used in the limit test of sulphates because it helps in the precipitation of sulphates as insoluble barium sulphate (BaSO4). This makes it easier to quantitatively determine the amount of sulphate present in a sample through gravimetric analysis. The addition of excess HCl ensures that all sulphates are converted to BaSO4, allowing for accurate measurement.


What the purpose of the ammonium acetate in the gravimetric determination of aluminum as oxinate?

The purpose of the ammonium acetate in the gravimetric determination of aluminium as oxinate is as a buffer. As more ammonium acetate is added, this caused the complex of the aluminium in the solution to precipitate after the yellow supernatant was formed. Excess ammonium acetate is needed to ensure all of the crystals precipitated out completely.


Why should a large excess of activated carbon be avoided?

A large excess of activated carbon should be avoided because it can remove essential nutrients and beneficial microorganisms from the environment. This can disrupt the balance of the ecosystem and harm living organisms that rely on those nutrients and microorganisms for survival. Excessive use of activated carbon can also lead to wastage and unnecessary costs.


Why should excess bromine water be avoided in the test for free tryptophan?

Excess bromine water should be avoided in the test for free tryptophan because it can cause the breakdown of tryptophan, leading to false negative results. Bromine water is a strong oxidizing agent that can react with tryptophan and other organic compounds, potentially altering the test outcome.


What products should be avoided to help the environment?

Many companies now a days are working towards making their products environmentally friendly. Some products to avoid are those with excess plastic or that cannot be recycled. Aerosol products should also be avoided as they are bad for the atmosphere.


In estimation of copper and nickel why we are using volumetric for copper and gravimetric for nickel seperately?

It is simply because they could not be found together!! copper can be estimated by treating with potassium iodide and iodine will be liberated in the reaction which is titrated against sodium thiosulphate during the reaction we will add sulphuric acid to prevent the hydrolysis of copper sulphate and we follow by, adding ammonia to neutralize sulphuric as it may hinder the reation between iodide and copper!! now again we will add acetic acid to neutralize ammonia.. and the indicator is added at the last because it will get absorbed with the iodine!! now atlast we add ammonium, thiocyanate to prevent the excess of iodine getting added to copper iodide. end point is disappearance of blue color.


Why should addition of excess water to the pile be prevented?

Adding excess water to a compost pile should be avoided because it can lead to anaerobic conditions, resulting in foul odors and slow decomposition. Excess moisture can also create a soggy environment that hinders aeration, making it difficult for beneficial microorganisms to thrive. Proper moisture levels promote efficient composting, ensuring that organic materials break down effectively and produce nutrient-rich compost.


Can you determine the atomic weight of zinc or copper by methods use by experiment chemical formulas?

You could determine the atomic weight of zinc and copper by the following: Heat a known mass of copper with excess sulfur. Add excess concentrated HCl to a known mass of zinc to dissolve. Heat on steam bath until liquid is gone. Heat product until hot and almost liquid. Weight it. Then use the atomic weights and molecular formulas of S Cl and H to determine Zn and Cu.


When thiamin is consumed in excess of needs how does the body treat the excess?

it does not absorb excess