What colour does blue litmus paper turn when dipped in alkaline?

Answer 1

Blue litmus paper stays blue in a neutral solution. It turns red only when in an acidic solution. Similarly, red litmus paper would stay red in a neutral solution and turn blue in an alkaline solution.

Added:

acidic: pH below 5.5 it turns (stays) red

alkaline: pH above 8.0 it turns (stays) blue

neutral, in between 5.5 and 8.0: its color is purple,

between 'red and blue' or 'blue and red'

A much better indicator paper is universal indicator paper. It is yellow and can tell you the exact pH of the solution it is dipped in, going yellow to red in acidic conditions, blue to purple in alkaline conditions and green in neutral conditions. The exact colour depends on the pH.

Answer 2

If you have Blue Litmus paper and add an Alkali,It will turn blue because on a pH Scale Alkalis are 14,13,12,11,10 which are Purple or blue.

Answer 3

the red litmus paper turns to blue in a alkaline solution

Answer 4

Blue litmus paper remains blue, because litmus paper remains blue in alkaline solutions and turns red in acidic solutions.

Answer 5

The color of litmus paper in a neutral solution is purple.

Answer 6

Litmus paper turn to blue in basic solutions.

Answer 7

Red litmus turns blue in alkaline solutions.

Answer 8

Under pH=4,5: red to pink
4,5-8,3: purple
Over 8,5: blue

Answer 9

colour less