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Acid and alkali
Properties
Physical change
Chemical change
Physical and Chemical Change
involves changes to the physical properties of a substance without any new substances being formed.
Physical change
Chemical change
Produces one or more new substances, which have different physical and chemical properties from the original substance.
Reactant- the original substanceProduct- new substance formed
Physical change
Condition Chemical change
No Is there any new substance formed?
Yes
Yes Is the change reversible?
No (not always)
Yes, changes in the physical properties
Are there any changes in the properties of the original substance?
Yes, changes in both chemical and physical properties
Chemical Equation
• Chemical equations are used to describe chemical reactions.
• They tell us about the reactants that are involved, as well as the products that are formed at the end of the reaction.
Carbon dioxide + Glucose + Oxygen
Light
Chlorophyll
Reactants Carbon dioxide and water
Products Glucose and oxygen
Conditions Light and chlorophyll
Homework:
Bring 3 tablets of ANTACID ( antacil, etc.)Salt water ( if possible)Salt