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What laboratory evidence do you need to show that chemical reaction has taken place?
Wiki User
∙ 10y ago
That depends very much on what reaction is taking place. For some reactions a thermometer is all you need. For others, such as titrations, you need some sort of indicator, such as Eriochrome Black T. Other reactions may require a manner of collecting gas, still others, such a precipitation reactions, may only require your eyes.
Wiki User
∙ 14y ago
Wiki User
∙ 10y agoSigns 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
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What evidence is there to show that a chemical reaction has taken place when an egg is cooked?
The change in color indicates that a chemical reaction has taken place.
What take place during a chemical reaction?
During a chemical reaction the breaking of the older bonds and formation of the new bonds take place.
What is meant by thermodynamics of a chemical reaction?
It refers to the energy changes that take place during a chemical reaction.
Are chemical reactions a chemical change of original substances before a chemical reaction takes a place?
Substances are changed only after the beginning of a chemical reaction.
What is chemical lab?
it means the place that you do experiments , hypothesis ,,,,,,,,,,,,,,,,,,,, . for teaching students about science .
What changes gives NO evidence that a chemical reaction has taken place?
Physical changes give no evidence that a chemical reaction has taken place, because no chemical reaction has taken place.
What evidence is there to show that a chemical reaction has taken place when an egg is cooked?
The change in color indicates that a chemical reaction has taken place.
What evidence that a chemical reaction has taken place would a living thing show?
work
What evidence was there that a chemical reaction was taking place in the decomposition of hydrogen peroxide?
The decomposition of H2O2 is exothermic and oxygen is released.
What evidence do you have that a chemical reaction took place?
changes in its appearance ie colour and state
How can you be sure that at least one chemical change has occurred?
Evidence that a chemical reaction has taken place usually include appearance of a precipitate, change in color, or production of a gas.
What form of evidence do you need to show that a chemical reaction has taken place?
You must video tape it and make sure the final result is either a physical change or a chemical change.
What is the evidence that a chemical reaction took place when zinc mixed with HCl?
Yes, and zinc chloride and hydrogen are obtained.
What is the evidence that a chemical reaction took place when silver nitrate was mixed with ammonium chloride?
A white precipitate of silver chloride (AgCl) is formed.
What is the reaction when zinc reacts with sulphuric acid?
We can see bubbles of gas being released. The gas is a new substance, so this is evidence that a chemical reaction is taking place. the gas released during this reaction is hydrogen.
Heat is felt when a warm object is place in your hand chemical reaction?
It's a physical reaction not a chemical reaction.
What a chemical reaction mean?
A chemical reaction is; when there is a chemical change taking place from energy or shifting of molecular structure.
