Way back when I was in high school (3000 BC) acid turned litmus paper pink and a base turned it blue.
When litmus paper touches an acid, the paper changes to red. When it touches a base, the paper changes to blue. By comparing the color the litmus paper changed to by a chart, you could determine how strong or weak that acid or base is.
Red litmus paper remains red when dipped into an acid. Blue litmus paper will turn red in an acid. Similarly, Blue litmus remains blue in a base. Red litmus turns blue in a base.
Nothing, red litmus paper changes in the presence of an acid not a base, blue litmus paper turns red with nitric acid
this is very easy to understand if u place red litmus paper in a acid it turns red/pink. if u place red litmus paper in a base it turns blue. blue litmus paper in a acid turns pink/red. blue litmus paper in a base stays blue.
Litmus paper: red color in acidic solutions and blue color in basic solutions.Phenolphthalein: no color in acidic solutions.
Blue litmus turns red in the presence of an acid. The opposite is correct in case of a base ie in presence of a base, red litmus turns blue in colour.
HCl (hydrochloric acid) is an acid so it will turn litmus paper red. and alkali will go from red litmus to blue.
Litmus paper usually turns either blue or pink (sometimes red) which indicates whether the chemical is an acid or a base. If the paper turns blue it is a base. If pink or red it is an acid.
It is a neutral. Try it with litmus paper and no color change will occur.
Blue litmus paper turns RED in an acid. Red litmus paper turns BLUE in a base.
Some substances do not change the color of litmus paper because they are neither acid or nor base. They are called neutral substances.
Litmus paper will turn blue when detecting a base, and red when detecting an acid.