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Why did the potassium permanganate crystals start to dissolve in water without being stirred?
Potassium permanganate is highly soluble in water, so it will dissolve without needing to be stirred. The dissolution process occurs due to the attraction between the ions in the crystal and water molecules, causing the crystal to break down and disperse evenly throughout the water.
What concentration of potassium permanganate is suitable for purifying drinking water?
Potassium permanganate (KMnO4) is poisonous in high concentrations, and is not typically used for disinfecting drinking water. It is used in low concentrations for iron and manganese oxidation as well as total organic carbon (TOC) reduction.High concentrations of KMnO4 result in pink colored water.
Why potassium permanganate is discolored in the presence of 1-butanol 2-butanol but slowly acidifies by 2-methyl-2-propanol though all three alcohols have the same molecular formula?
1-Butanol is a primary alcohol (the OH group is attached to a carbon that is only attached to one other carbon) and is oxidised to butanal.2-Butanol is a secondary alcohol (the OH group is attached to a carbon that is attached to two other carbons) and is oxidised to butanone.2-methyl-2-propanol is a tertiary alcohol (the OH group is attached to a carbon that is attached to three other carbons) and this means it does not react with potassium permanganate as it can no longer undergo anymore oxidations. This is why it does not show a visible reaction with potassium permanganate.
What is potassium's ductility?
Potassium is a soft metal with low ductility. It is malleable and can be easily cut with a knife. However, it is too soft to be drawn into thin wires without breaking.
Is heating potassium chloride crystals a physical or chemical change?
Heating potassium chloride crystals is a physical change because it only affects the physical state of the substance (solid to liquid) without changing its chemical composition.
Why did the potassium permanganate crystals start to dissolve in water without being stirred?
Potassium permanganate is highly soluble in water, so it will dissolve without needing to be stirred. The dissolution process occurs due to the attraction between the ions in the crystal and water molecules, causing the crystal to break down and disperse evenly throughout the water.
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.
Does potassium permanganate and copper sulphate undergo sublimation?
No, potassium permanganate and copper sulfate do not undergo sublimation. Sublimation is the process in which a substance transitions directly from a solid to a gas without passing through a liquid phase. Potassium permanganate and copper sulfate undergo a different process known as decomposition when heated.
Diffusion of potassium permanganate and water?
Potassium permanganate particles diffuse into water molecules and the particles of potassium permanganate mix into water even without stirring. From the higher concentration to lower concentration.
How long does it take for sugar to dissolve without being stirred in soda?
It can take several hours for sugar to fully dissolve in a soda without being stirred. The rate of dissolution depends on factors like temperature, sugar crystal size, and saturation level of the liquid.
Why does the color of potassium permanganate not disappear when excess of ethanol is added to it?
The color of potassium permanganate does not disappear when excess ethanol is added because ethanol is unable to fully reduce the permanganate ion (MnO4-) to colorless manganese dioxide (MnO2). Ethanol is a weak reducing agent and is not capable of completely reducing the permanganate ion in this reaction. Additionally, the reaction between potassium permanganate and ethanol is not stoichiometric, meaning that there is an excess of one of the reactants, which can also contribute to the color persisting.
Which sugar cube dissolved faster when stirred or not stirred?
The sugar cube would dissolve faster when stirred. When you stir a sugar cube in water, you increase the rate at which molecules of sugar come into contact with water molecules, speeding up the dissolving process. Without stirring, the process is slower as diffusion is the only mechanism that helps the sugar dissolve.
What concentration of potassium permanganate is suitable for purifying drinking water?
Potassium permanganate (KMnO4) is poisonous in high concentrations, and is not typically used for disinfecting drinking water. It is used in low concentrations for iron and manganese oxidation as well as total organic carbon (TOC) reduction.High concentrations of KMnO4 result in pink colored water.
Why potassium permanganate is discolored in the presence of 1-butanol 2-butanol but slowly acidifies by 2-methyl-2-propanol though all three alcohols have the same molecular formula?
1-Butanol is a primary alcohol (the OH group is attached to a carbon that is only attached to one other carbon) and is oxidised to butanal.2-Butanol is a secondary alcohol (the OH group is attached to a carbon that is attached to two other carbons) and is oxidised to butanone.2-methyl-2-propanol is a tertiary alcohol (the OH group is attached to a carbon that is attached to three other carbons) and this means it does not react with potassium permanganate as it can no longer undergo anymore oxidations. This is why it does not show a visible reaction with potassium permanganate.
Is salt and ethanol a heterogenous solution before mixing?
Almost no salt will dissolve in pure ethanol. If salt is added to a solution of ethanol and water, which are miscible, it may form a homogenous solution without being stirred.
How will you prepare a supersaturated solution of potassium nitrate in water?
To prepare a supersaturated solution of potassium nitrate in water, you would first dissolve an excess amount of potassium nitrate in hot water, stirring continuously until no more of the salt can dissolve. Then, let the solution cool slowly without disturbing it, which will allow the excess salt to form crystals at the bottom, creating a supersaturated solution above it.
Why does mixing alcohol sulfuric acid and potassium permanganate make a thunderstorm?
Concentrated sulfuric acid reacts with Potassium permanganate to produce manganese VII oxide (commonly called manganese heptoxide), Mn2O7. Mn2O7 is a very strong oxidizer and will rapidly react with most organic compounds even at room temperature. In this case the reaction is able to produce light and sound even without contact with oxygen gas.
