state the feature of chemical equation
Answers
In a chemical equation, the reactants are written on the left, and the products are written on the right. ... Chemical equations should contain information about the state properties of products and reactants, whether aqueous (dissolved in water — aq), solid (s), liquid (l), or gas (g).
Changes in texture may also indicate a change in molecular structure. For example, if two runny liquids combine to produce a liquid which is thick and rubbery, it is likely that a chemical reaction has taken place. Changes in luster may also occur after a chemical reaction. Luster is how "shiny" an object appears due to the way it reacts to light. If dull substances become lustrous after being combined, it's a sign that a chemical reaction has taken place.
The observation of bubbles is a good visual indication that a chemical reaction has taken place. Bubbles indicate that a gas may have formed in the course of the reaction.
Changes in color, texture and luster don't always mean that a chemical reaction has taken place, nor does the presence of bubbles. But because all are common characteristics of chemical reactions, they can serve as clues that a molecular change may have occurred.
Other Observable Characteristics
Changes in odor are a common characteristic of certain chemical reactions. Subtle changes are not as likely to indicate a chemical reaction as drastic changes. For example, if two sweet-smelling liquids smell smoky or sour after they're combined, it may indicate a chemical change.
Changes in temperature often take place in chemical reactions. A simple thermometer can measure the temperature of substances before and after a reaction. If an observable change in temperature occurs, it is a sign that a chemical reaction may have occurred.
Formation of a precipitate is a characteristic of many chemical reactions. Precipitates are solids which may form in solutions or in other solids during chemical reactions. For example, when you combine silver nitrate and sodium chloride, the resulting reaction causes a precipitate of silver chloride to form.