# Why do potassium permanganate and methylene blue diffuse at different rates?

As the blue dye diffuses in the Jello, the dye spot increases in size. Potassium Permanganate is approximately half the molecular weight of Methylene Blue and diffuses more rapidly than Methylene Blue, resulting a slightly larger radius for the Potassium Permanganate dye spot than for Methylene Blue.

Methylene blue it has a higher molecular weight than potassium permanganate, therefore the smaller, the lighter the molecules are diffused faster than the heavier one. The molecular weight and time affect the diffusion of the particle.

Additionally, does potassium permanganate diffuse more rapidly through water or through agar gel why? Why? (A) It diffuses more rapidly through agar, because water attracts the dye molecules and slows their movement. (D) It diffuses more rapidly through agar, because there are channels in it that help the dye solution to move.

Beside above, why is potassium permanganate used in diffusion?

Potassium Permanganate Diffusion in Water This experiment demonstrates the principle of chemical diffusion using potassium permanganate in water. Because of the random movement of potassium permanganate particles, a dense purple solution forms in water at base of the beaker.

Which dye used in the diffusion experiment diffuse fastest?

methylene blue

### Why does temperature affect the rate of diffusion?

Temperature: Higher temperatures increase the energy and therefore the movement of the molecules, increasing the rate of diffusion. Lower temperatures decrease the energy of the molecules, thus decreasing the rate of diffusion. Solvent density: As the density of a solvent increases, the rate of diffusion decreases.

### How do you determine the rate of diffusion?

Graham’s law states that the rate of diffusion or effusion of a gas is inversely proportional to the square root of its molar mass. See this law in equation form below. In these equations, r = rate of diffusion or effusion and M = molar mass.

### Which diffused dye is faster?

In general, it does not make sense, because as you stated, a lower molecular wt compound should diffuse faster than a higher molecular wt compound. Assuming the temperature is constant, it might be that the blue dye was present at a significantly higher concentration then the red dye.

### Why do dye molecules move in water?

Random movements of the dye and water molecules cause them to bump into each other and mix. Thus, the dye molecules move from an area of higher concentration to an area of lower concentration. Eventually, they are evenly spread throughout the solution. This means the molecules have reached a dynamic equilibrium.

### Why did the dye molecules move in agar gel?

The agar gel is a Jello-like substance, composed of ~98% water. Because of its high water content, the dye molecules will move freely through the gel.

### How does concentration affect diffusion?

While diffusion will go forward in the presence of a concentration gradient of a substance, several factors affect the rate of diffusion: Extent of the concentration gradient: The greater the difference in concentration, the more rapid the diffusion. If the medium is less dense, diffusion increases.

### Why do smaller molecules diffuse faster?

Mass of Particle: Heavier particles will move more slowly and so will have a slower rate of diffusion. Smaller particles on the other hand will diffuse faster because they can move faster.

### Does the rate of diffusion change over time?

Yes,r the smaller the molecular weight the faster it diffuses. The rate changes over time because once the molecules reaches equilibrium diffusion slows down. Calculated diffusion rate would be faster than actual, because we really do not know the equilibrium of a molecule in a medium when it diffuses.

### Can we drink potassium permanganate water?

Potassium permanganate oxidizes iron, manganese, and hydrogen sulfide into particles. When treating water to remove iron bacteria, a solution of potassium permanganate is fed into the well. A concentration of 3.8 to 7.6 grams per gallon has been found to be very effective.

### What happens if you put potassium permanganate in water?

If a solid sample of Potassium permanganate is placed in water, the water molecules will interact with the Potassium cations and the permanganate anions held in the crystal to break the ionic bonds that hold the crystal together. Eventually one ends up with a homogeneous solution of Potassium permanganate in water.

### Is potassium permanganate toxic?

Potassium permanganate is mainly used as an antiseptic agent. Suicidal attempt by KMnO4 is rarely reported. Being highly corrosive and oxidizing agent, it can produce local as well as systemic toxicity. Upper airway injuries due to oral ingestion can be lethal because of the difficult airway and respiratory failure.

### Why does potassium turn purple in water?

This is an exothermal reaction and potassium is heated to such an extend that it burns a purple flame. Additionally, hydrogen released during the reaction strongly reacts with oxygen and ignites. Potassium reacts with water more slowly than does rubidium, which is placed under potassium in the periodic chart.

### Is potassium permanganate good for skin?

Potassium permanganate is a skin disinfectant and cleansing agent. It is used for soothing eczema (skin rash) and drying wet wounds. Dissolve a few crystals in a container of water.

### How do you prepare KmnO4?

Potassium Permanganate 0.1 N: Dissolve 3.3 g of reagent grade potassium permanganate (KmnO4) in 1 L of purified water and heat on a steam bath for two hrs. Cover and allow to stand for 24 hrs. Filter through a fine porosity sintered glass crucible, discarding the first 25 mL.