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If a substance effervesces is there a chemical reaction taking place?
Wiki User
∙ 13y ago
no because, you shouln`t be cheating on your homework.
Wiki User
∙ 13y ago
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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.
Is reaction with acid a physical or chemical property?
A physical reaction is when no new substances are formed, there is a change of state eg ice melting to a liquid. A chemical change is when the reaction forms a new substance. eg gas bubbles. An acid reaction can be both. You need to look at the reaction taking place, look for change of state (physical) or any colour change or gas bubbles (chemical).
What number do you place to the left of the formula for a substance taking part in a reaction?
Coefficient
How does colourless Hcl turns to yellow?
a chemical reaction is taking place
Is coal gas a mixture or a compound?
A mixture as the is no chemical reaction taking place
When two or more substances combine in a chemical reaction to form another substance a blank reaction is taking place?
Reactants
What are the five clues that suggests a chemical reaction is taking place?
first when there's a physical change in the substance second there will be a solution or a formula to that substance third is, it involves temperature fourth is change in color of the substance fifth is the bubbling of another substance is yet an another clue that a chemical reaction has occured.
Why is a phase change a physical change and NOT a chemical change?
Because no chemical reaction is taking place. It is the same substance, just in a different state of matter.
What is the definition chemical change?
Chemical ChangesAs opposed to a physical change, chemical changes are present when the substance undergoes a chemical reaction and produces a new substance. A chemical change is a chemical reaction that will always take place for there to be a chemical change. Signs that a reaction is taking place: Formation of gases (bubbles), Color change, production of heat or light, and the formation of a solid. a change in composition and characteristics of matter.new substance maybe formed.original substance and form may be lost.new color and shapeExamplesFermentationPhotosynthesisRusting nailSpoiling milkDigesting food
Substance that changes the rate of chemical reactions?
A Catalyst enhances and speeds a chemical reaction without actually taking part in the 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.
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.
What chemical reaction is taking place in the green organelles in plant cells?
This chemical reaction is called photosynthesis.
Is reaction with acid a physical or chemical property?
A physical reaction is when no new substances are formed, there is a change of state eg ice melting to a liquid. A chemical change is when the reaction forms a new substance. eg gas bubbles. An acid reaction can be both. You need to look at the reaction taking place, look for change of state (physical) or any colour change or gas bubbles (chemical).
What is a precipitate and when is it observed?
an insoluble sold formed in a chemical reaction that is taking place on a solution. Observed when the amount (concentration) of that substance is greater than its solubility. small crystals settel out in the container.
Can a substance be radioactive without a nuclear reaction taking place?
Yes, it is possible; disintegration is not considered a nuclear reaction.
What number do you place to the left of the formula for a substance taking part in a reaction?
Coefficient
