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there are mainly two ways that indicate that a chemical change has taken place. These ways are the physical properties (the way things look, without changing the chemical makeup of a substance) are different, and the chemical properties (the way the substance reacts with other substances) are different.
Wiki User
∙ 11y ago
Wiki User
∙ 6y ago1. You have a new substance. 2. You have bubbles. 3. Heat/ temp change 4. unexpected color change That's all I can think of sorry there's more
Wiki User
∙ 9y agoThere are multiple quantitative and qualitative indications that chemical reactions have taken place. These include color and temperature changes, and the formation of precipitates.
Wiki User
∙ 13y ago1. A change in state 2. a chemical change has occurred 3. A change in size/shape
Wiki User
∙ 13y agoGas is given off in the form of bubbles
A colour change may occur
Wiki User
∙ 13y agoThree signs that a chemical reaction occurred are colour change, temperature change, and the formation of a precipitate.
Wiki User
∙ 12y agocolour change, new material, temperature change
Wiki User
∙ 11y agoSigns for a chemical reaction/change can be the release of gases, bubbling and/or a colour change. However the last one might be applicable to a physical change only.
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What are the three basic types of reaction mechanism?
Types of chemical reactions:- synthesis- decomposition- single displacement- double displacement
List three signs that could make you think a chemical reaction might be taking place?
Some signs that a chemical reaction is taking place is color and temperature changes, and the formation of precipitates.
What Three Things Stay The Same Before And After A Chemical Reaction?
The mass of the reactants is equal to the mass of the products.The atomic nucleus reamain unchanged in chemicals involved.
What are three things that will slow-down the rate of a chemical reaction?
There are three things that can slow down a chemical reaction. You can have an inhibitor, something that is used to decrease the rate of a reaction, you can decrease the temp. making it colder, and decreasing the surface area (it takes longer for something to dissolve like a whole sugar cube, when it takes only a matter or seconds for a spoon full of sugar to dissolve). Hope that helped! If you need any more help, just comment.
Chemical reactions can be detected by changes in?
Temperature change. The fourth class of reactions is much more difficult to detect than the previous three. This fourth class is really the basis of the other three. Every chemical reaction involves energy in some form, because all chemical reactions involve the breaking of old bonds, the forming of new bonds, or both. We know that every chemical bond contains energy, or it would not exist. This result means that every chemical reaction involves an energy change because the bonds are changed. Energy tied up in the bonds of atoms, molecules, ions, and the rest of the chemical system is called enthalpy. The absolute amount of this energy cannot be measured, but the change in enthalpy from the reactants to products can be measured. If the energy is lost (given off), the reaction is exothermic; if energy is gained, the reaction is endothermic
What are the three signs that a chemical change is occurring?
solid,liquid,or gas
What are three clues that tell you a chemical change has happened?
Some indicators of a chemical reaction are:- change of color- change of odor- release of a gas- change of the temperature- change of the viscosity- formation of a precipitate- change of general appearance- possible explosion- possible chemiluminiscence -formation of new compounds
What is the chemical reaction for the formation of rubber?
The type of chemical reaction that takes place through the formation of the rubber is called the mechano-chemical reaction. Through this, it gives the end product a three dimensional structure.
What are three facts about a chemical reaction are provided by a chemical equation?
1. formulas of reactants and products2. amounts of reactants and products3. sense of the reaction
What properties can be observed during a chemical reaction?
Some indicators of a chemical reaction are:- change of color- change of odor- release of a gas- change of the temperature- change of the viscosity- formation of a precipitate- change of general appearance- possible explosion- possible chemiluminescence -formation of new compounds
What are three energy transformations occurring during the production of energy for human use?
heat
What are three indicators of growth or financial indicator in business strategy?
the three indicators, unemployment, inflation and GDP growth
What is polymerisation reaction?
Polymerisation is a process of reacting monomer molecules together in a chemical reaction to form three-dimensional networks or polymer chains.
What are three factors of the speed at which a chemical reaction happens?
temperature presence or absence of a catalyst concentration of reactants
What are Pipkin's three categories of incident indicators?
three categories of pipkins
Describe three changes in appearance which show that a chemical reaction is taking place?
The colour, the temperature and formation of gas
When does a chemical reaction reaches equilibrium?
equilibrium means the rate of forward reaction = rate of backward reaction... there are three types of equilibrium 1. amount of products > amount of reactants 2. amount of products = amount of reactants 3. amount of products < amount of reactants
