Three indicators that chemical change has occurred?

Answer 1

1. A colour change

2. Energy being absorbed/released - in the form of light/heat etc

3. An odour change

4. Production of a gases/solids

5. It is difficult to convert the products back into the reactants

Answer 2

here are a few:

1. color change

2. density change

3. smell change

4. taste change (for food)

5. bubbles form

6. smoke either forms when somthing is burning

if this dosent work for you feel free to change my answers :)

Answer 3

- formation of a precipitate

- release of a gas

- change of aspect

- change in temperature

- change of color

- change of odor

- change of viscosity in solotions

- change of the pH

etc.

Answer 4

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

Answer 5

1. Formation of a new substance with different properties.
2. Release or absorption of heat or light.
3. Production of a gas, precipitate, or color change.

Answer 6

Three indicators that a chemical change has occurred are: change in temperature, bubbles forming, or a change of color. Other indicators are a change of state or a formation of a precipitate.

Answer 7

change in color

release of gas

formatin of solid

Answer 8

Change of the state of the matter, release of a gas, a new odor, a new color, formation of a precipitate, a violent reaction with explosion or fire, increase of the temperature, etc.

Answer 9

formation of a precipitate

formation of a gas

change in temperature

Answer 10

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