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Coffee has an acidic pH - red with litmus paper.
Draino turns litmus paper blue.
Coffee is generally acidic, thus the blue litmus paper will turn red. However, the pH of coffee can vary depending on the kind. Dark roasted coffees tend to be more alkaline and the blue litmus paper may stay blue when dipped.
Being that coffee is acidic litmus paper should turn reddish
Red litmus paper turns blue in a basic solution. There is no effect on blue litmus paper.
carbon monoxide is neutral to litmus
Lemon juice is an acid therefore, it turns blue litmus paper red and red litmus paper remains red
death.
calcium hydroxide turn red litmus paper into blue because it is a base. it does not have any effect on blue litmus paper.
litmus color changes into blue.
Litmus paper is an indicator that changes color when affected by the pH of certain chemicals. There are two colors to test the general pH of a solution. Alkaline solutions (bases) turn red litmus paper blue. Acidic solutions (acids) turn blue litmus paper red.
Ammonia turns red litmus paper blue, but does not have any effect on blue litmus parer, since it is a base.