answersLogoWhite

0

Signs of chemical reactions may be: - Gas release - Formation of a precipitate - Change of color - Change of odor - Change of pH - Change of aspect - Change of viscosity - Change of the temperature - Visible formation of new compounds - Change of the state of the matter - A violent reaction with explosion or fire - Bubbling - Emitting a sound - Emitting a light

User Avatar

Wiki User

7y ago

What else can I help you with?

Continue Learning about Natural Sciences

Describe three changes in appearance which show that a chemical reaction is taking place?

Change in color: If the reactants and products have different colors, a visible color change can indicate a chemical reaction. Formation of a gas: Production of bubbles, froth, or fizzing can indicate a gas is being released during a chemical reaction. Formation of a precipitate: If a solid substance forms in a solution, it can indicate that a chemical reaction has occurred leading to the formation of an insoluble product.


Do visible changes never occur in a reaction mixture?

Of course they do. Some examples are fizzing, when a gas is produced, colour changes, and the formation of precipitates.


How can show what happens in a chemical reactions?

You can show what happens in a chemical reaction by writing a balanced chemical equation that represents the reactants turning into products. Alternatively, you can use diagrams or drawings to illustrate the rearrangement of atoms and bonds during the reaction. Physical changes such as color changes, gas production, or temperature changes can also indicate a chemical reaction is occurring.


How do color changing shirts change color in sunlight?

The shirts contain a thermochromic (temperature sensitive) pigment which changes colour when cold or hot and when the sunlight heats up the pigment, the shirt changes colour.


How can people tell the chemical reaction in a beaker?

People can tell a chemical reaction is occurring in a beaker by observing changes such as color, gas production, temperature change, formation of a precipitate, or the release of light or sound. These visual clues can indicate that new substances are being formed due to the chemical reaction taking place.

Related Questions

What is an indicator of a chemical reaction?

A visible change in color, formation of a precipitate, evolution of gas, or change in temperature are indicators of a chemical reaction. These changes typically signify that the chemical composition of the substances involved in the reaction has been altered.


Why are you born with birth marks?

it is a reaction to the skin that changes colour


What evidence do you have that a chemical reaction took place?

Evidence of a chemical reaction includes the formation of a new substance with different properties, changes in color, the release of gas or heat, or the formation of a precipitate. Additionally, changes in mass due to the rearrangement of atoms in the reactants can also indicate a chemical reaction has occurred.


What observations suggest that a chemical reaction has occurred?

One observation that a chemical change has occurred is the formation of a new product. Another observation is the change in identity and composition of a substance.


Explain how you can tell whether a chemical reaction has taken place?

A chemical change or reaction happens if new substances are formed. there may be a change in temperature so the reaction mixture may heat up or cool down. it also might change colour, give off bubbles of gas or fumes and you also might hear fizzing or a gas might explode.


How is a student able to conclude that a chemical reaction occurred?

Some observations: - change of colour - formation of a precipitate - change of odor - change of temperature - release of a gas - change of pH - change of viscosity etc.


Which are 4 indications of chemical reaction has occurred?

The indicators of a chemical reaction are :- 1. Change in colour 2. Change in temperature 3. Evolution of a gas 4. Formation of a precipitate


Describe three changes in appearance which show that a chemical reaction is taking place?

Change in color: If the reactants and products have different colors, a visible color change can indicate a chemical reaction. Formation of a gas: Production of bubbles, froth, or fizzing can indicate a gas is being released during a chemical reaction. Formation of a precipitate: If a solid substance forms in a solution, it can indicate that a chemical reaction has occurred leading to the formation of an insoluble product.


If you are trying to decide whether a chemical reaction does or does not take place when two substances are mixed what kind of evidence will you look for?

To determine if a chemical reaction takes place when two substances are mixed, you can look for evidence such as color change, formation of precipitate, gas production, change in temperature, and the evolution of light or sound. These observable changes indicate a chemical transformation has occurred.


What is the difference between an equation and a reaction?

it is when the colour of your skin changes to purple and you grow hair everywhere ;)


What are examples that indicate a chemical reaction has occurred?

There are lots of telltale signs, basically any changes that happen to the reaction. For example, this could be a colour change, a mass change as a gas is given off, a pH change, a noise given off, a temperature increase/decrease, fizzing or bubbling.


What is the least effective way of dimming tungsten lighting for colour photography?

Rheostat. Dimming by rheostat changes the colour temperature of the light