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.
Coffee has an acidic pH - red with litmus paper.
I think you meant baking soda. Baking soda is basic, so red litmus paper will turn blue.
It turns blue. Since chalk ( CaCo3) is a base and when pink litmus paper reacts with a base it turns blue
the color of the litmus paper does not change.
Red
soap is basic therfore, soap solution will keep blue litmus paper blue and turn red litmus paper blue
Coffee has an acidic pH - red with litmus paper.
Being that coffee is acidic litmus paper should turn reddish
The litmus paper will turn red.
orange
Otgfcch
blue
Coke is acidic; a red color.
It stays blue.
blue
blue
dark green
blue litmus remains blue while red litmus changes to blue