What is the use of blue litmus paper ??
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The blue litmus paper is used to test the acidic nature and will turn the red colour in acidic solutions. For basic solutions it will not change the colour. In acidic conditions it will turn to red colour and for base it will not change its colour.
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The main use of litmus is to test whether a solution is acidic or basic. Light-blue litmus paper turns red under acidic conditions, and red litmus paper turns blue under basic or alkaline conditions, with the color change occurring over the pH range 4.5–8.3 at 25 °C (77 °F). Neutral litmus paper is purple.
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