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1 : pure Elements like Sodium and Chlorine chemically combine to form Salt...NaCl a new substance.
2: .Combustion of a fuel to produce new substances ...CO2 + H2O.
3: Chemical reaction between a metal and an acid... Iron (Fe) + Hydrochloric acid produced Iron Chloride (FeCl2) and Hydrogen gas. (H2).
Fe(s) + 2HCl(aq) = FeCl2(s) + H2(g). (new substances).
- Formation of new chemical bonds between reactant particles, leading to the creation of new compounds.
- Changes in energy levels, such as the absorption or release of heat or light during the reaction.
- Alteration in the physical state of the reactants or products, including changes in color, odor, or phase (solid, liquid, gas).
You can have
- change in colour
- emission of heat
- formation of a new substance (e.g. precipitation)
1. PH change
2. Produce a new substance
3. A change in colour
4. Produce heat
Three examples of chemical changes are oxidation, toxicity, corrosivity.
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What changes the rate of a chemical reaction or allows a chemical reaction to occur?
Heat?
Do chemical changes only happen at a heigh temperature?
No, chemical changes can occur at various temperatures depending on the specific reaction. While many chemical reactions do happen at higher temperatures to provide enough energy for the reaction to occur, there are also reactions that occur at lower temperatures. Temperature is just one factor that can influence the rate of a chemical reaction.
What are Two main kinds of changes that you can observe when chemical reaction occur?
a precipitate is a solid that forms during a chemical reactions
Is anti- acid tablets in water a chemical reaction or physical change?
When an antacid tablet dissolves in water, it is a chemical reaction. The tablet reacts with the water to neutralize excess stomach acid, which changes the chemical composition of both the tablet and the water.
Is changes in energy a chemical change?
Changes in energy themselves are not considered chemical changes. Instead, changes in energy may occur as a result of a chemical change taking place, such as in an exothermic or endothermic reaction where energy is either released or absorbed.
What comes out of a reaction?
Chemical changes occur after a chemical reaction.
What changes the rate of a chemical reaction or allows a chemical reaction to occur?
Heat?
What is it called when changes occur when bonds form between atoms?
A chemical reaction, a chemical change.
Do chemical changes only happen at a heigh temperature?
No, chemical changes can occur at various temperatures depending on the specific reaction. While many chemical reactions do happen at higher temperatures to provide enough energy for the reaction to occur, there are also reactions that occur at lower temperatures. Temperature is just one factor that can influence the rate of a chemical reaction.
What changes can you observe when cemical reactions occur?
It depends on the chemical reaction. For example when you burn something it is a chemical reaction, but that is way different than if you mix baking soda and vinegar which is also a chemical reaction. It changes the matter into a different chemical matter make up of that substance.
Describe the two types of energy changes that occur in a chemical reaction?
An exothermic reaction and the change between potential and kinetic.
What are Two main kinds of changes that you can observe when chemical reaction occur?
a precipitate is a solid that forms during a chemical reactions
In terms of chemical bond and electrons what kind of changes occur between atoms when substances undergo chemical reaction?
hi
What is a reaction in a chemical reaction in science?
A reaction in a chemical reaction refers to the transformation of one or more substances into new substances with different properties. This process involves the breaking and formation of chemical bonds between atoms or molecules. Energy changes may also occur during a chemical reaction.
Is anti- acid tablets in water a chemical reaction or physical change?
When an antacid tablet dissolves in water, it is a chemical reaction. The tablet reacts with the water to neutralize excess stomach acid, which changes the chemical composition of both the tablet and the water.
Is changes in energy a chemical change?
Changes in energy themselves are not considered chemical changes. Instead, changes in energy may occur as a result of a chemical change taking place, such as in an exothermic or endothermic reaction where energy is either released or absorbed.
What changes occur when a chemical reaction?
During a chemical reaction, bonds between atoms are broken and new bonds are formed, resulting in the rearrangement of atoms to form new molecules with different properties. Energy is either absorbed or released during the reaction, and the total mass of the reactants is conserved in the products.
