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The only sure way to prove that a chemical reaction has occurred is to demonstrate a change in the chemical composition of the substances involved. This can be done by analyzing the reactants and products using techniques such as spectroscopy, chromatography, or mass spectrometry to identify any new substances formed. Additionally, measuring physical changes such as color, temperature, gas production, or precipitate formation can also provide evidence of a chemical reaction taking place.
What else can I help you with?
How might a thermometer help you decide if there was any chemical change on mixing iron and charcoal?
For a chemical change to occur, there must be a chemical reaction. A chemical reaction would be either endothermic (uses energy, mostly heat), or exothermic (produces energy, again mostly heat). Any change in temperature of the reactants, as measured by a thermometer, will tell you not only ifa chemical reaction occurred, but also which kind of chemical reaction. No temperature change usually indicates that no reaction has occurred, a decrease in temperature would indicate an endothermic reaction, while an increase in temperature would indicate an exothermic reaction.
Which type of substance can only be separated by a chemical reaction?
A compound can only be separated into its constituent elements by a chemical reaction. In a chemical reaction, the bonds holding the atoms in the compound together are broken, resulting in the formation of new substances.
According to the law of conservation of matter the number of is not changed by a chemical reaction.?
According to the law of conservation of matter, the total mass of substances before a chemical reaction is equal to the total mass after the reaction. This means that the number of atoms is not changed during a chemical reaction, only their arrangement.
Is melting of lead a chemical reaction?
No, melting of lead is a physical change, not a chemical reaction. A chemical reaction involves the breaking and forming of chemical bonds to create new substances, while melting only involves a change in state from solid to liquid with no change in chemical composition.
How do solids affect equilibrium in a chemical reaction?
Solids do not affect the equilibrium of a chemical reaction because their concentration remains constant and does not change during the reaction. Only the concentrations of gases and dissolved substances in a reaction mixture can affect the equilibrium position.
What is the only sure evidence for a chemical reaction?
The only sure evidence for a chemical reaction is the formation of new substances with different properties from the original reactants. This can be observed through changes in color, odor, temperature, or the production of a precipitate or gas.
How might a thermometer help you decide if there was any chemical change on mixing iron and charcoal?
For a chemical change to occur, there must be a chemical reaction. A chemical reaction would be either endothermic (uses energy, mostly heat), or exothermic (produces energy, again mostly heat). Any change in temperature of the reactants, as measured by a thermometer, will tell you not only ifa chemical reaction occurred, but also which kind of chemical reaction. No temperature change usually indicates that no reaction has occurred, a decrease in temperature would indicate an endothermic reaction, while an increase in temperature would indicate an exothermic reaction.
Is substance melts proof that a chemical change has occurred?
no unless there is a chemical change but there isn't. only a physical change has occurred
Why a catalyst is not involved chemically in chemical reaction?
The catalyst is not a reactant; a catalyst only favors a chemical reaction, the reaction rate and yield.
Is sawing a log chemical reaction?
No, that would probably be considered a physical change. It is only a chemical reaction its chemical makeup is changed.
Which type of substance can only be separated by a chemical reaction?
A compound can only be separated into its constituent elements by a chemical reaction. In a chemical reaction, the bonds holding the atoms in the compound together are broken, resulting in the formation of new substances.
What historical antecedent to consumer protection occurred in the 1950s?
a significant breakthrough occurred with the establishment of the product-liability concept, whereby a plaintiff did not have to prove negligence but only had to prove that a defective product caused an injury
Which sub-atomic particle creates chemical reaction?
Proton and Neutron do not take part in chemical reaction. Only electron takes part in the reaction.
A compound can only be changed how?
A compound can only be changed by a chemical reaction.
If new products are made in a chemical reaction what does that suggest about the reaction?
No new products can be made in a chemical reaction. Only the reactants exchange or react with another element.
Radioactive decay is chemical reaction or?
it is type of nuclear reaction because nucleus is involve in this type of reaction while in ordinary chemical reaction only valance electron of atoms involve
Can energy be taken only during a chemical reaction?
Depending on the particular chemical reaction, energy may be either released or absorbed.
