🗊Презентация Acids and alkalis

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Слайды и текст этой презентации

Слайд 1


Acids and Alkalis Learning Objectives To know that solutions can be sorted by whether they are: acid, alkali or neutral. To understand that an alkali reacts with an acid to cancel it out. To know that indicators show you how acidic or alkaline a solution is.
Описание слайда:
Acids and Alkalis Learning Objectives To know that solutions can be sorted by whether they are: acid, alkali or neutral. To understand that an alkali reacts with an acid to cancel it out. To know that indicators show you how acidic or alkaline a solution is.

Слайд 2


Acids and alkalis Solutions can be sorted by whether they are: acid, alkali or neutral.
Описание слайда:
Acids and alkalis Solutions can be sorted by whether they are: acid, alkali or neutral.

Слайд 3


Acids and alkalis, слайд №3
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Слайд 4


Acids react with metals and carbonates. Metal + Acid Salt + Hydrogen magnesium + magnesium chloride + hydrochloric acid hydrogen
Описание слайда:
Acids react with metals and carbonates. Metal + Acid Salt + Hydrogen magnesium + magnesium chloride + hydrochloric acid hydrogen

Слайд 5


Acids Lemon juice contains citric acid, and vinegar contains ethanoic acid. Some strong acids are hydrochloric acid, sulphuric acid and nitric acid. Some weak acids are ethanoic acid, citric acid and carbonic acid.
Описание слайда:
Acids Lemon juice contains citric acid, and vinegar contains ethanoic acid. Some strong acids are hydrochloric acid, sulphuric acid and nitric acid. Some weak acids are ethanoic acid, citric acid and carbonic acid.

Слайд 6


Neutralisation Acids and alkalis react with each other. The alkali cancels out the acid in the reaction. This is called neutralisation.
Описание слайда:
Neutralisation Acids and alkalis react with each other. The alkali cancels out the acid in the reaction. This is called neutralisation.

Слайд 7


Salts The salt made depends on the acid and alkali used. The salt contains the metal atom from the alkali, and part of the acid molecule.
Описание слайда:
Salts The salt made depends on the acid and alkali used. The salt contains the metal atom from the alkali, and part of the acid molecule.

Слайд 8


Alkalis When the oxides of some metals dissolve in water they make an alkali solution. Alkalis react with acids and neutralise them.
Описание слайда:
Alkalis When the oxides of some metals dissolve in water they make an alkali solution. Alkalis react with acids and neutralise them.

Слайд 9


Alkalis Alkalis are present in many cleaning substances in use in our homes. Kitchen cleaners are alkaline because they contain ammonia or sodium hydroxide, which attack grease.
Описание слайда:
Alkalis Alkalis are present in many cleaning substances in use in our homes. Kitchen cleaners are alkaline because they contain ammonia or sodium hydroxide, which attack grease.

Слайд 10


Indicators They change colour in acid or alkaline solutions. Different indicators change to different colours.
Описание слайда:
Indicators They change colour in acid or alkaline solutions. Different indicators change to different colours.

Слайд 11


Litmus Test Litmus is an indicator. It changes colour in acid and alkaline solutions. Litmus is red in an acid. Litmus is blue in an alkali.
Описание слайда:
Litmus Test Litmus is an indicator. It changes colour in acid and alkaline solutions. Litmus is red in an acid. Litmus is blue in an alkali.

Слайд 12


Universal Indicator Universal indicator changes colour in acids and alkalis.
Описание слайда:
Universal Indicator Universal indicator changes colour in acids and alkalis.

Слайд 13


The pH scale
Описание слайда:
The pH scale

Слайд 14


Applications of Neutralisation Indigestion: Our stomach carries around hydrochloric acid. Too much of this leads to indigestion. To cure indigestion, you can neutralise the excess acid with baking soda or specialised indigestion tablets.
Описание слайда:
Applications of Neutralisation Indigestion: Our stomach carries around hydrochloric acid. Too much of this leads to indigestion. To cure indigestion, you can neutralise the excess acid with baking soda or specialised indigestion tablets.

Слайд 15


More Applications of Neutralisation Factory Waste: Liquid waste from factories is often acidic. If it reaches a river it will destroy and kill sea life of many forms. Neutralising the waste with slaked lime can prevent this.
Описание слайда:
More Applications of Neutralisation Factory Waste: Liquid waste from factories is often acidic. If it reaches a river it will destroy and kill sea life of many forms. Neutralising the waste with slaked lime can prevent this.

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