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Презентация, доклад по химии 8 кл по теме Основания на английском языке
Содержание
- 1. Презентация по химии 8 кл по теме Основания на английском языке
- 2. BASES
- 3. Aims:form knowledge about the composition of bases,
- 4. Acid and base reactions – neutralization. FeatureOH-Base
- 5. Слайд 5
- 6. Слайд 6
- 7. Physical Properties of Alkalis:Alkalis have the following
- 8. Classification of the basesSoluble in water (alkali)LiOH, Ca(OH)2, Ba(OH)2 AmphotericZn(OH)2, AL(OH)3, Be(OH)2Insoluble in waterCu(OH)2, Fe(OH)2, Fe(OH)3
- 9. Chemical properties of the substrate:
- 10. https://www.youtube.com/watch?v=gRZ-2IbLd34
- 11. Thank you for attention!!!
BASES
Слайд 3Aims:
form knowledge about the composition of bases, charge of hydroxide ion,
physical properties of bases and their application in life
find out what chemical properties apply to alkali, to get acquainted with the main representatives
find out what chemical properties apply to alkali, to get acquainted with the main representatives
Слайд 4Acid and base reactions – neutralization.
Feature
OH-
Base – a substance which
will neutralize an acid to give a salt and water only.
Слайд 7
Physical Properties of Alkalis:
Alkalis have the following properties:
Alkalis have bitter taste
and a slippery soapy feel.
Alkaline solutions have pH values greater than 7. (More about pH value in the next sub-topic)
Alkaline solutions turn red litmus paper blue.
Alkaline solutions have pH values greater than 7. (More about pH value in the next sub-topic)
Alkaline solutions turn red litmus paper blue.
Chemical Properties of Alkalis:
There are four common reactions of alkalis:
Neutralization reaction
Reaction with ammonium salt
Precipitation of metal hydroxides
Reaction with metals
Слайд 8Classification of the bases
Soluble in water (alkali)
LiOH, Ca(OH)2, Ba(OH)2
Amphoteric
Zn(OH)2, AL(OH)3,
Be(OH)2
Insoluble in water
Cu(OH)2, Fe(OH)2, Fe(OH)3
