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What else can I help you with?
Is there a chemical that can stop water from evaporating?
Dissolving any salt into water will raise the boiling point.
How do you prepare polymer blend?
By dissolving 2 polymers, mixing the solution, adding a surfactant and evaporating the solvent. Alternatively you can heat the polymers above the melting point and mix them
Give 5 examples of a reversible change?
Melting wax Melting ice freazing water Evaporating the water Cooling the steam
Why isn't dissolving sugar a chemical change?
Because the sugar stays sugar and the molecules themselves are unchanged, it does not change into another substance. Also, the process can easily be reversed by the physical process of evaporating the water.
Is dissolving sodium chloride in water a physical or chemical charge?
Dissolving sodium chloride (table salt) in water is a physical change. When sodium chloride dissolves, it dissociates into its constituent ions (sodium and chloride) but retains its chemical identity. The process is reversible; the salt can be recovered by evaporating the water, demonstrating that no new substances are formed.
Is there a chemical that can stop water from evaporating?
Dissolving any salt into water will raise the boiling point.
Dissolving sugar in lemon water is physical or chemical?
Physical change- it can be undone by evaporating the water.
How do you prepare polymer blend?
By dissolving 2 polymers, mixing the solution, adding a surfactant and evaporating the solvent. Alternatively you can heat the polymers above the melting point and mix them
How could you prove to someone that the dissolving was a physical to change not a chemical change?
You can demonstrate that dissolving is a physical change by showing that the chemical composition of the substance remains the same before and after dissolving. This can be done by evaporating the solvent and obtaining the original substance in its solid form. Chemical changes involve a change in the chemical composition of the substances involved, leading to the formation of new substances, which is not the case in dissolving.
Give 5 examples of a reversible change?
Melting wax Melting ice freazing water Evaporating the water Cooling the steam
Do you need a 9volt battery to make a crystal?
No. You can make a crystal by dissolving something such as salt into hot water until no more will dissolve, and then cooling the solution. Or by dissolving something such as salt into water and gradually evaporating the water away, or by cooling a liquid , or a vapour below its triple point.
How are boiling and evaporating similar How are they different?
they are the same cause they are both changeing water or ice to a gas
How are boiling and evaporating similar and how are they different?
they are the same cause they are both changeing water or ice to a gas
How do you explain dissolving?
Dissolving is a process where a solute (such as sugar or salt) breaks down into individual particles and mixes evenly with a solvent (such as water) to form a solution. This occurs at a molecular level as the solvent molecules surround and separate the solute particles. Dissolving is a physical change that can be reversed by evaporating the solvent, leaving behind the solute.
How is sweating and evaporating similar?
Sweating and evaporating are similar because evaporating is the change of liquid water to water vapour, which requires heat, and sweating is where the skin produces liquid sweat, which is a mixture of water and other substances, which absorbs heat from your skin as it is transformed into a vapour. As you see, when you sweat your sweat is actually evaporated into the air, while absorbing your body and cooling you off!!
Is dissolving the calcium in water a chemical change?
Dissolving calcium in water is a physical change because the chemical composition of calcium does not change during the process. It is a reversible process, and the calcium can be retrieved by evaporating the water.
Why isn't dissolving sugar a chemical change?
Because the sugar stays sugar and the molecules themselves are unchanged, it does not change into another substance. Also, the process can easily be reversed by the physical process of evaporating the water.
