what is litmus? how it is prepared ?
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Litmus solutions can beprepared by dissolving these lichen-based dyes in neutral-pH water and observing the change in color when chemicals of unknown pH are added. Litmus paper is pH neutral paper soaked in litmus solution and dried. ... The word 'litmus' comes from old Norse with a meaning of 'to dye' or 'to stain.
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Litmus paper are those papers used to know the nature of the mixture or any liquid weather it is basic, acidic or neutral in nature. If an mixture is basic it will turn red litmus blue or if it is acidic it will turn blue litmus red.
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