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What observations does not indicate that a chemical change has occurred a. change of state b. formation of a precipitate c. absorption of energy d. release of a gas?
Wiki User
∙ 10y ago
acually the answer depends on the nature of chemical reaction under consideration and depending on the reaction, there are two possible answers: a change of state and absorption of energy.
Wiki User
∙ 10y ago
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How can you know this is a chemical reaction?
Evidence of a chemical reaction include the following: formation of a precipitate formation of a gas change in temperature change in color
What are the three visible signs of chemical reactions?
Some indicators of a chemical reaction are:- formation of new compounds - change of color- change of odor- release of a gas- change of the temperature (absorption or release)- change of the viscosity- formation of a precipitate- change of general appearance- possible explosion - sometimes a sound is produced - possible chemiluminescence
2 colorless liquids produce a white precipitate when they are mixed together is it a chemical change or a physical change?
Chemical change. The formation of a precipitate is one indication that a chemical reaction has taken place.
What clues can you use to identify a chemical change?
Characteristics of a chemical change can include a temperature change, a color change, the production of bubbles, the production of a precipitate, and a smell.
If tap water and soap form an insoluble deposit is this a physical or chemical change?
The formation of a precipitate is a chemical change.
How could you tell if a chemical reaction was happening?
realease or absorption of energy product of a gas formation of a precipitate change in color
What are the five observations of chemistry that shows that a chemical reaction have taken place?
Formation of a precipitate; change in color; change in temperature; formation of a gas; emission of light.
What is usually evident of a formation of a precipitate?
Formation of a precipitate is evidence of a chemical reaction.
What is an example of the formation of a precipitate?
Formation of a precipitate is evidence of a chemical reaction.
Is milk thickening a chemical or physical change?
The thickening is caused by the formation of a precipitate. The formation of a precipitate is a chemical reaction.
Is an formation of precipitate an indication of a chemical change?
a
What formation is an indicator of chemical change?
precipitate
What do you look for in a chemical change?
change in color, formation of gas and precipitate ;))
How can you know this is a chemical reaction?
Evidence of a chemical reaction include the following: formation of a precipitate formation of a gas change in temperature change in color
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.
What are the sings of chemical reactions?
The signs of a chemical reaction include change in temperature, change in color, formation of gas, formation of a precipitate, disappearance of a solid, formation of a new odor.
What are the three visible signs of chemical reactions?
Some indicators of a chemical reaction are:- formation of new compounds - change of color- change of odor- release of a gas- change of the temperature (absorption or release)- change of the viscosity- formation of a precipitate- change of general appearance- possible explosion - sometimes a sound is produced - possible chemiluminescence
