why does sugar dissolve in water for kids
This video gives an illustrative example of solution, Solute and Solvent. Solution, Solute and Solvent
A simple is formed by mixing two substances evenly together. One of them is called the Solute and the other is the Solvent. The substance, to be dissolved is called Solute and Solvent does the dissolving. This video is all about Solution, Solute and Solvent. Solutions are homogeneous systems. Everything in a solution is evenly spread out and thoroughly mixed. Lets compare sugar in water to sand in water. Sugar dissolves and is spread throughout the glass of water. The sand is engulfed to the bottom. The sugar-water is a homogeneous mixture while the sand-water is a heterogeneous mixture. Both can be called mixtures but only the sugar-water can also be called a solution. Can mixing any two substances be a solution? Solutions can be formed by dissolving solids in liquids.
In general uses, we usually dissolve solids into liquids. Gases, dissolved in liquids, such as carbonated water can also be called Solution. We can mix gases in other gases and liquids in liquids. A mixture is called a solution if two things stay at an even distribution after mixing them up. You probably wont find anyone making solid-solid solution. It is usually started as solid/gas/liquid-liquid solutions and then hardened at room temperature. Admixtures of different types of metals are examples of solid solutions formed at room temperature. These admixtures are called. As a rule of thumb, there is usually more solvent than solute. Solubility of a solution can be defined as the amount of a particular solute, can be dissolved by the solvent. Difference between Solution and colloid: Science has special names for everything.
They also have names for the different types of homogeneous mixtures. Solution is the common term used for describing homogeneous mixtures containing small particles. Colloids are solutions with comparatively bigger particles. Colloids are usually foggy or milky when you look at them. In fact, milk is an emulsified colloid. Todays experiment is very simple, but hopefully fascinating for even very young children. What you need Substances to try and dissolve eg. sugar, coffee, pepper, sand. Instructions Add a teaspoon of whichever solid you are testing to a glass of cold water and a glass of hot water, stir and observe the difference. Look to see if the solid dissolves in the hot water and cold water and if one is better than the other. Can you design a chart to record your observations?
The Science bit Things like salt, sugar and coffee dissolve in water. They are soluble. They usually dissolve faster and better in hot water. Pepper and sand are insoluble, they will not dissolve even in hot water. For older children Everything is made of particles which are always moving. When a soluble solid ( solute ) is mixed with the right liquid (solvent), it forms a solution. This process is called dissolving. Two things that affect the speed at which the solid dissolves are temperature and the size of the grains of the solid. Caster sugar which is made of fine particles will dissolve quickly, but bigger sugar particles will take longer. Solids dissolve faster in hot water as in hot water the water molecules are moving faster, so bump into the solid more often which increases the rate of reaction.
- Views: 222
why do we need glucose in our body
why is ph important in biological systems
why does sound travel fastest in solids
why do you use salt to make ice cream
why do we use eggs in baking