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.
Some substances do not change the color of litmus paper because they are neither acid or nor base. They are called neutral substances.
Nothing, red litmus paper changes in the presence of an acid not a base, blue litmus paper turns red with nitric acid
Blue
yes a blue litmus paper turns red when put into an acid
If you are using red litmus paper, a base will turn the litmus paper blue.
the red litmus paper turns to 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.
blue
Blue
A blue color
blue
Blue.
blue
Ammonia turns red litmus paper blue, but does not have any effect on blue litmus parer, since it is a base.
Way back when I was in high school (3000 BC) acid turned litmus paper pink and a base turned it blue.
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.