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The blue litmus paper will turn red when hydrochloric acid is added

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grp 2: Chemical reactions that causes the change of the litmus paper's colour from blue to red when acid is used and red to blue when Akali is used

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G5)
The blue limus paper turned red when acid is added and red limus paper turned blue when alkali is added

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hydrochloric acid changes the litmus paper to red while alkali changes litmus paper to blue .
the acid turns the universal indicator to red while the sodium / calcium hydroxide which is alkali turns the universal indicator to purple .

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Grp2: Acid has a characteristic to change objects to red as it has more corrosion than Akali, which turns objects to blue

grp 2: Chemical reactions that causes the change of the litmus paper's colour

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grp 8
Chemical reaction changes the colour of the litmus paper from blue to red,red to blue

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A chemical reaction totally not magic

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I see that acid and alkaline have different effects on blue and red litmus paper.
I see that different acids have a different effect during the universal indicator the acids will have an orange/red/yellow colour, the alkaline however will have a green/blue/purple colour

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chemical reaction

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chemical reaction when alkali and acid when there it is in contact with the litmus paper .

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Grp 5. The acid had a chemical reaction with the blue limus paper and turned it red and the alkali had a chemical reaction with the red limus paper and turned it blue

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i can conclude that there is chemical reaction in this experiment

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grp 8
chemical reaction

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Grp2: Does the colour change(Akali and Acid) effect other objects?

What led to the discovery of the pH chart

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Acid causes a chemical reaction in the blue litmus paper turning it red
Alkali causes a chemical reaction in the red litmus paper turning it blue

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Why is there only blue and red

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Red litmus paper stands for acids, Blue litmus paper stands for alkali
How does the Universal Indicator indicate how acidic/mucb alkaline something is - Is it a chemical change or a physical change?