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List three signs that could make you think a chemical reaction might be taking place?
Wiki User
∙ 9y ago
Some signs that a chemical reaction is taking place is color and temperature changes, and the formation of precipitates.
Wiki User
∙ 9y ago
Hus
Wiki User
∙ 11y ago-Colour Change
-Bubbles Form
-Gas occurs
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Is oxidation chemical or physical reaction?
Oxidation is the recombination of atoms of one molecule with oxygen. An example might be the rusting of iron: 2Fe(s) + 3O2(g) --> 2Fe2O3(s) Therefore, oxidation is chemical reaction.
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.
What evidence of a chemical reaction might you see dropping an alka-seltzer tablet into a glass of water?
it will dissolve
What is called chemical reaction rate?
The speed of the reaction
If gold does react to water is it a chemical or physical change?
gold has no reaction in water, or acid. if there is no reaction that means no chemical reaction. the gold gets wet, or changes temperature in the water, that might be considered a physical change. gold is remarkably unreactive as far as metals go.
What might be formed in the chemical reaction H202?
H2O2 is not a chemical reaction, it is Hydrogen Peroxide.
Why is there no evidence of a chemical reaction when water molecules are produced in a double replacement reaction?
This is not, strictly speaking, true. There is evidence of a chemical reaction in, for example, the reaction of aqueous HCl with an NaOH solution, even though there is no precipitate, no color change, and no evolution of gas. You just might not notice it unless you carried it out in a calorimeter and could measure the release of chemical energy as heat.
Give three things you might see if a chemical reaction takes place?
There are many observations that may occur when a chemical reaction takes place. Some of the things are:- Change of colour, change of temperature change of state. These can be observed by the features below There might be a change in colour when mixing the reactants; the vessel in which the reaction is taking place might get warm on the outside or cold depending on the type of reaction. There may be effervescence or fizzing with gas production; a precipitate may form.
What simple test might be undertaken to check if a chemical reaction produces oxygen?
glowing splint ... if it relights then the chemical reaction produces oxygen.
Could you tell me about a silver dollar that turned blue can you tell me anything about that?
It might be a chemical reaction from water if the metal itself is blue. Otherwise, it might be stained from food or paint.
What Three Things can happen when a Chemical Reaction occur?
A chemical reaction can change a substance into a solid, liquid, or gas. It may cause a substance to explode or could cause no change at all.
What evidence of a chemical reaction might you see by rusting of an iron nail?
oxidation
What might release energy during a chemical reaction?
a cake anything cooked
Do catalyst produce chemical reactions?
yes chemical reactions in order to induce a chemical reaction that might normally take a long time
What type of chemical reaction is this caCO3 CaO CO2?
Decomposition Reaction
What from of energy might be needed for a chemical reaction to take place?
heat & electric energy !
What evidence of a chemical reaction might you see by dropping an alka seltzer in water?
its a chemical reaction becase once the alka seltzer melts you cant take it out and put it back together
