Procedure: place at least 3 tablespoon of salt in 250 ml beaker. Add 100ml water and stir it to dissolve salt. Boil the solution to dryness. Is there a new product form? Did you observe a physical or chemical change? Did you observe a chemical reaction? If so, what is the chemical equation. What changes in state of matter did you observed? What evidence is there that a physical or chemical change has taken place?
States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
Procedure: place at least 3 tablespoon of salt in 250 ml beaker. Add 100ml water and stir it to dissolve salt. Boil the solution to dryness.
- Is there a new product form?
- Did you observe a physical or chemical change?
- Did you observe a
chemical reaction ? If so, what is the chemical equation. - What changes in
state of matter did you observed? - What evidence is there that a physical or chemical change has taken place?
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