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Freshly prepared lime water, which is a saturated solution of calcium hydroxide, is used in experiments to test the evolution of carbon dioxide because it reacts with CO2 to form a white precipitate of calcium carbonate. This reaction is a simple and reliable way to detect the presence of carbon dioxide gas. The white precipitate formed confirms the evolution of CO2 in the experiment.
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Why FeSO4 solution is freshly prepared?
FeSO4 solution is typically prepared freshly because iron (II) ions are prone to oxidation in aqueous solutions, leading to the formation of insoluble Fe(OH)2 or Fe(OH)3 precipitates. This oxidation can result in inaccurate concentration measurements and affect the experimental results. Therefore, freshly prepared FeSO4 solutions ensure the stability and reliability of the solution for experimental purposes.
Why starch indicator should be prepared freshly?
To prepare 1% starch indicator weigh 1g of starch powder.Measure 100ml of water and keep it for heating.by using some of 100ml water taken,make a paste of starch in watchglass and mix this paste with little and continuous strring of water which is kept for heating.when all the paste is added,allow for heating 5more minutes then starch indicator is ready for titration.Note:no lumps of starch should present in water
Why is it necessary to dissolve or rehydrate agar in freshly prepared distilled water?
Simple answer is that the sample is soluble in water. The primary reason to use distilled water is to maintain the purity of the sample. Municipal water is treated with chlorine to prevent bacterial growth, plus the water picks up traces of metal from the pipes, valves and tanks it travels through on the way to your faucet.
Experiments using salt water and fresh water?
Experiments comparing the densities of salt water and fresh water can demonstrate how salinity affects the buoyancy of objects. Salt water is denser than fresh water due to the dissolved salt, causing objects to float higher in salt water compared to fresh water of the same volume. This phenomenon is demonstrated in experiments such as the floating egg or sinking and floating objects in different types of water.
What is the abbreviation for deionized water and what is its significance in laboratory experiments?
The abbreviation for deionized water is DI water. It is important in laboratory experiments because it is free of ions, which can interfere with chemical reactions and measurements. DI water helps ensure accurate and reliable results in scientific research.
Why freshly prepared lime water used in experiments to test evolution of gas?
Freshly prepared lime water is used in experiments to test the evolution of gases because it turns milky when carbon dioxide is present. This is a simple and visual way to detect the presence of carbon dioxide gas, which is often a byproduct of various chemical reactions, including those related to the process of evolution.
Why sodium thiosulphate solution is prepared in freshly boiled and cooled water?
Sodium thiosulfate solution is prepared in freshly boiled and cooled water to remove any dissolved gases or impurities that could interfere with its chemical reactions. Using boiled water helps ensure a clean solution for accurate results when used in reactions, such as in titrations or photochemical processes.
Why must the white lotion be freshly prepared before its use?
It needs to be freshly prepared due to it having water content without appropriate preservatives to stop microbial growth from occuring. The shelf life of this lotion is not long since there are no preservatives inside the formulation.
Why FeSO4 solution is freshly prepared?
FeSO4 solution is typically prepared freshly because iron (II) ions are prone to oxidation in aqueous solutions, leading to the formation of insoluble Fe(OH)2 or Fe(OH)3 precipitates. This oxidation can result in inaccurate concentration measurements and affect the experimental results. Therefore, freshly prepared FeSO4 solutions ensure the stability and reliability of the solution for experimental purposes.
Why starch indicator should be prepared freshly?
To prepare 1% starch indicator weigh 1g of starch powder.Measure 100ml of water and keep it for heating.by using some of 100ml water taken,make a paste of starch in watchglass and mix this paste with little and continuous strring of water which is kept for heating.when all the paste is added,allow for heating 5more minutes then starch indicator is ready for titration.Note:no lumps of starch should present in water
Why is it necessary to dissolve or rehydrate agar in freshly prepared distilled water?
Simple answer is that the sample is soluble in water. The primary reason to use distilled water is to maintain the purity of the sample. Municipal water is treated with chlorine to prevent bacterial growth, plus the water picks up traces of metal from the pipes, valves and tanks it travels through on the way to your faucet.
What is prepared environment?
we prepared environment......... it is prepared by wind,water,fire,sand...
Why do water drops bead on a freshly waxed surface?
Water drops bead on a freshly waxed surface because the wax creates a hydrophobic barrier that repels water. This causes the water to form into beads instead of spreading out. The surface tension of the water also helps to maintain the spherical shape of the droplets on the waxed surface.
Why is it necessary to dissolve or rehydrate agar in fleshly reared distilled water?
We do not understand what you mean by "freshly reared distilled water", you can not "rear" water.
Which property of water causes water drops to bead on s freshly waxed car?
Water molecules are sticky due to hydrogen bonds
Have any scientists made water?
Water is the byproduct of some experiments.
Which property of water causes drops on a freshly waxed car?
This phenomenon is called surface tension.
