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Why did the potassium permanganate start to dissolve without being stirred?
Potassium permanganate is water-soluble and therefore will dissolve in water without stirring due to its high solubility, even without additional agitation. The dissolution process is driven by the interaction between the water molecules and the potassium permanganate particles without the need for external stirring.
How do you separate a mixture of cis and trans potassium dioxalatodiaquochromate?
4 Cis- and trans potassium dioxalatodiaquachromato (III) Materials required:Oxalic acid, potassium dichromate a)Trans isomer of K{Cr(C2O4)2(H2O)2|3H2O Dissolve 12 g of oxalic acid monohydrate in a minimum amount of boiling water in a 250 ml beaker. Add in small portions a solution of 4 g of potassium oxalate in a minimum of hot water, covering the beaker while the violent reaction proceeds. Evaporate the solution to about one third of its original volume. Filter the crystals and wash with cold water and ethanol. A high yield cannot be expected since only a part of the product is isolated. Note that in solution there is an equilibrium between the cis- and thetrans isomer, but the low solubility of the trans isomer results in its initial deposition. Excessive spontaneous evaporation should be avoided since otherwise the product may be contaminated with the cis isomer. b) Cis isomer of K{CR(C2O4))(H2O)2}2H2O Prepare an intimate mixture of finely ground potassium dichromate(4 g) and oxalic acid dihydrate (12 g) and heap the powder in a 15 cm diameter evaporating dish. Place one drop of water in a small depression in the mixture and cover the dish with a watch glass. After a short induction period the reaction commences and soon becomes vigorous with the evolution of steam and carbon dioxide. A solution of the product cannot be formed, and hence an equilibrium mixture of cis- and trans-isomers is not formed. The outcome of this reaction is a purple viscous liquid to which is added 20 ml of ethanol. The mixture is stirred until the reaction product solidifies. If solidification is slow, decant the liquid and repeat with a second portion of ethanol until the product is entirely crystalline. Filter at the pump. ** Purity test of the isomers:Place a few crystals of the complex on a filter paper and add a few drops of diluted aqueous ammonia. The cis-isomer rapidly forms a deep green solution which spreads over the filter paper, and no solid remains. The trans-isomer forms a light brown solid which remains undissolved. These changes are due to the formation of cis- and trans- dioxalatohydroxoaquachromium(III) ions.
What was the effect of cyclone Tracy on the hydrosphere?
Cyclone Tracy caused storm surges and intense rainfall, leading to flooding and erosion on the coastline. The storm also stirred up the ocean, impacting marine life and habitats in the area.
Is a solution a homogeneous or heterogeneous mixture?
Homogeneous. because a solution is the same all the way throughout. Like stirred lemonade. The same way, homo in homogeneous means same.
How does the powdering of calcium carbonate increase the speed of its reaction with an acid?
It increases the effective surface area of the compound that is exposed to the acid molecules. It also allows a solution to be stirred to further increase the rate of interaction between acid and base molecules.
Why did the potassium permanent crystals in Figure 7.12 on page 197 start to dissolve in water without being stirred or shaken?
The potassium permanganate crystals started to dissolve in water without being stirred or shaken because of the process of diffusion. Diffusion is the movement of particles from an area of higher concentration to an area of lower concentration. The crystals dissolved as their particles spread out and mixed with the water molecules.
Why did the potassium permanganate start to dissolve without being stirred?
Potassium permanganate is water-soluble and therefore will dissolve in water without stirring due to its high solubility, even without additional agitation. The dissolution process is driven by the interaction between the water molecules and the potassium permanganate particles without the need for external stirring.
Will salt crystals dissolve more rapidly in stirred or unstirred water?
Salt crystals will dissolve more rapidly in stirred water compared to unstirred water. Stirring water helps to increase the contact between the salt crystals and the water molecules, facilitating the dissolution process.
How much time does it take sugar to dissolve in milk?
It typically takes a few minutes for sugar to dissolve in milk when stirred continuously. The time can vary depending on factors such as the temperature of the milk and the size of the sugar crystals.
Why does a sugar cube dissolve slower when not stirred?
When a sugar cube is not stirred, the surface area exposed to the solvent is limited, which slows down the rate of dissolution. Stirring increases the contact between the sugar cube and the solvent, allowing the sugar molecules to dissolve more quickly.
What chemical dissolves very quickly in water that nobody would see it being mixed?
Potassium permanganate dissolves very quickly in water and forms a purple solution. The dissolution process happens rapidly and may not be easily observed, especially if the solution is stirred or agitated.
Does stirred sugar dissolve faster?
Yes
Will salt solutions dissolve faster if stirred?
yes
Why is it that the sugar crystals disappear when stirred in water?
The sugar crystals have no added colour and are 'white' crystals in appearance. Once dissolved into the water, they create a transparent sugary solution. The same is for salt crystals that create a saline solution.
What did the powdered drink mix dissolve easily when stirred?
saturated
How much time to dissolve the sugar?
The time it takes to dissolve sugar depends on factors like the temperature of the liquid, the size of the sugar crystals, and how vigorously the mixture is stirred. It typically takes a few minutes for sugar to dissolve in hot water, while it may take longer in cold water or other liquids.
What happens to salt when it is put into cold water and stirred?
When salt is added to cold water and stirred, the salt crystals dissolve in the water. This process is known as dissolution, where the salt molecules break apart from the crystal structure and mix evenly with the water molecules. It may take longer for salt to dissolve in cold water compared to hot water due to the lower kinetic energy of the molecules.
