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When a small piece of potassium is dropped into a beaker of water the potassium moves about rapidly and then ignites within secounds the metal is gone and all activity ceases Is that chemical change?
Yes, according to wikipedia: Potassium reacts very violently with water producing potassium hydroxide (KOH) and hydrogen gas.2 K (s) + 2 H2O (l) → 2 KOH (aq) + H2 (g) This is a chemical change.
How do i Separate naphthalene potassium chloride and sand?
Add warm water to dissolve the KBr which is very soluble. This would become the aqueous layer and would be more dense and thus at the bottom. Add them to a sep funnel and decant. Evaporate the water off and you have the KBr. The remaining fluid in the sep funnel is npahthalene
A piece of sodium that's dropped into a beaker of water?
When a piece of sodium is dropped into water, it reacts violently, producing hydrogen gas and heat. The reaction may lead to flames or an explosion due to the rapid release of hydrogen gas. This is because sodium is highly reactive with water, forming sodium hydroxide and releasing energy in the process.
Why does the purple colour spread when a crystal of potassium permanganate is placed in water?
The purple color spreads when a crystal of potassium permanganate is placed in water due to the dissolution of potassium permanganate molecules in water. Potassium permanganate is a highly soluble compound, and its purple color comes from the permanganate ions in the crystal dispersing in the water. This dispersion allows the purple color to be visible throughout the water.
If A beaker contains 100 grams of 1.7 M NaCl and you transfer 50 grams what is the molarity of the solution in the beaker?
After transferring 50 grams of the 1.7 M NaCl solution to a new beaker, the final amount of NaCl in the original beaker will be 50 grams. To find the new molarity, you would first calculate the new moles of NaCl in the beaker, then divide by the total volume of the solution in liters. The molarity will be reduced in the original beaker due to the dilution from transferring a portion of the solution.
Does a beaker break easily when dropped?
Of course not .Because most of the beaker is made of plastic ,we are not often see beaker made of ceramic and metal
Why did the potassium beaker not react when the flaming splint was used?
The potassium beaker did not react with the flaming splint because potassium is not a flammable substance. Potassium is a reactive metal that can react vigorously with water or air when exposed, but it does not burn in the presence of a flaming splint. The lack of reaction is due to the properties of potassium and its inability to support combustion.
What would happen to a marble if dropped into an empty container like a beaker while the person dropping it was in motion?
The marble will have the motion of the person who dropped it (I assume you mean by 'dropped' that it is not thrown by the person, just dropped), whilst I assume the beaker is stationary. I also assume the person is moving horizontally and the beaker is upright. Therefore the marble will arrive in the beaker with some sideways velocity and will strike the side of the beaker with a horizontal component of velocity as well as a vertical component. I should think it will spin round the beaker a few times before coming to rest, it might even bounce right out. You can't predict this exactly without some more information.
Is calcium chloride and potassium chloride crystals in a beaker a pure substance?
Calcium chloride and potassium chloride are pure substances.
What is occurring when a piece of potassium metal ignites in a beaker of water?
The potassium reacts with water to produce potassium hydroxide, hydrogen gas, and large amounts of heat. The heat ignites the hydrogen which in turn ignites the potassium.
When a small piece of potassium is dropped into a beaker of water the potassium moves about rapidly and then ignites within secounds the metal is gone and all activity ceases Is that chemical change?
Yes, according to wikipedia: Potassium reacts very violently with water producing potassium hydroxide (KOH) and hydrogen gas.2 K (s) + 2 H2O (l) → 2 KOH (aq) + H2 (g) This is a chemical change.
What would happen if a glowing splint is held at the mouth of a beaker containing a piece of potassium and water And what is the gas evolved?
If a glowing splint is held at the mouth of a beaker containing potassium and water, the potassium will react violently with the water, producing potassium hydroxide and hydrogen gas. The hydrogen gas is highly flammable, and as it is released, it can ignite from the heat of the reaction, resulting in a small explosion or fire. The gas evolved during this reaction is hydrogen.
What happens when an object is dropped into a beaker containing a liquid and then the object drops to the bottom of the beaker?
The density of the object is at least equal to, and possibly greater than, the density of the liquid in the beaker.
A beaker containing 80 grams of KNO3 in 100 grams of water have a temperature of 30 and Acirc and degC. Approximately how many grams of the salt are undissolved on the bottom of the beaker?
The mass of undissolved potassium nitrate is cca. 3 g.
When sodium metal is dropped into a beaker of water a chemical reaction occurs that increases the temperature of the water This is an example of what?
You think probable to an exothermic reaction.
What is the product of pottasium with water?
If a piece of Potassium is dropped into a beaker of water it whizzes around on the surface of the water. The reaction is so vigorous that the heat of it causes the Potassium metal to metal. It 'fizzes' and the heat generated can often cause the Hydrogen, that is produced by the reaction, to ignite with a lilac colour flame. Larger pieces of Potassium may even explode due to the vigor of the reaction. 2K + 2H2O ----> 2KOH + H2 (gas)
When was lamination invented?
It was invented in 1903 by a french chemist when he dropped a glass beaker coated in viscous collodion and it shattered, but didn't come apart because of the coating.
