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- pH value of more than 7
- tastes bitter
- corrosive
- turns red litmus paper to blue
- doesn’t react to metals

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- pH value of less than 7
- tastes sour
- corrosive
- turns blue litmus paper red
- react with metals to produce hydrogen gas

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Both acid and alkali have characteristics that differentiate between the two.

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Some more fun awaits

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Corrosive!

Put one drop of hydrochloric acid (concentrated) on a filter paper placed on a white tile

Record your observation

Repeat with sodium hydroxide (concentrated)

Have fun! ;)

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Which of the following maybe has a pH value of 1
A) strong acid
B) strong alkali
C) weak acid
D) weak alkali
E) neutral solution

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Red: new topic
Blue: info
Green: interesting facts
Purple: extra info
Yellow: summary
White: video/experiment

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Enough boring science! Let’s do fun science!

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Safe Science Experiments For Kids : Alkali Vs Acid

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In this movie ,Adam and Noah are experimenting the difference between Alkali and Acid materials.They got excited to see the reaction of mixing the 2 elements and the production of Carbon dioxide right in front of their eyes!! The experience itself is very safe and cool . Great way for education purposes.

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Action of Red and Blue Litmus Paper on Acid and Alkali - Experiment

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A little something to do with your knowledge of acids and alkalis

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Properties:
-pH value
-effects on indicators
-role of water
-corrosive
-reaction to metal

Indicator:
-blue/red litmus paper
-universal indicator
-methyl orange
-phenolphthalein
-pH meter

Uses:
-daily
-business

Neutralisation:
-titration

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Different acids and alkalis produce different salts. Examples:

Hydrochloric acid + sodium hydroxide (alkali) = sodium chloride
Sulphuric acid + potassium hydroxide (alkali) = potassium sulphate
Nitric acid + sodium hydroxide (alkali) = sodium nitrate

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Neutralisation occurs when an acidic substance is mixed with an alkaline substance and vice versa.

The equation for neutralisation is:

Acid +Alkali= salt + water

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Uses of acids and alkalis in business sectors 

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Uses of acids and alkalis in business sectors 

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Acids and alkalis are also used in sectors like agriculture and industry.

Examples:
Farmers use slaked lime (alkali) to neutralise acidic soil for their crops.

Industries use acidic substances to dissolve certain things depending on what they produce

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Here are some instances of acids and alkalis used in our daily lives:

Acid: vinegar -> food flavouring/preservative

Alkali: detergent -> washing clothes

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Acids and alkalis are always used in our daily lives. They are also used in sectors like agriculture and industry

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A pH scale is used to show the strength of acids or alkalis.
7 is the neutral level.
Any number below 7 is acidic. The lower the number, the more acidic the substance is.
Any number above 7 is alkalic. The higher the number, the stronger the alkali

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acids and alkalis will only show their properties in the presence of water

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Acid:red
Neutral:red
Alkali:blue

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Acid:red
Neutral:blue
Alkali:blue

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Acid:red
Neutral:yellow
Alkali:yellow

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Acid:red
Neutral:green
Blue:blue

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Acid:colourless
Neutral:colourless
Alkali:pink

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The characteristics of a substance can be determined with an indicator 

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The characteristics of a substance can be determined with an indicator 

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An indicator is a coloring or mixture of different colorings that change colour based on the substance used

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Soap, toothpaste, baking soda

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Vinegar, lemon juice, oranges

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The word acid comes from the latin word, acidus which means sour.
The word alkali comes from the arabic word, alqali which means ashes of plants

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Padlet project