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The color become blue.
Remains blue
Well if you place blue litmus paper in saliva and it turns red, then the saliva is acidic. If you put red litmus in the saliva and it turns blue, then the saliva is alkaline. However, if the red litmus doesn't change colour and the blue litmus doesn't change colour, the saliva would be neutral.
The blue litmus paper will not change color. Red litmus would turn blue in the presence of ammonia. Blue litmus paper will only change color in the presence of an acid, at which point it will turn red.
All salts are considered basic, and as such, when dissolved in water and subsequently tested with litmus paper, should turn a bluish color. The tint of the blue color should be recognizable, although would look pale when compared to stronger basic compounds (ammonia, baking soda dissolved in water, sodium hydroxide, etc.)
To a blue color.
blue
I think you meant baking soda. Baking soda is basic, so red litmus paper will turn blue.
Remains blue
The color become blue.
The color become blue.
baking soda is a base or alkali so when it comes in contact with a litmus paper or solution, the litmus turns blue
The colour is not changed.
Well if you place blue litmus paper in saliva and it turns red, then the saliva is acidic. If you put red litmus in the saliva and it turns blue, then the saliva is alkaline. However, if the red litmus doesn't change colour and the blue litmus doesn't change colour, the saliva would be neutral.
When a blue litmus paper are put in a solution of baking soda and the conditions are under the basic ph level, it will turn into red. And if a red litmus paper is put under acidic conditions, it will turn into blue.
red
The blue litmus paper will not change color. Red litmus would turn blue in the presence of ammonia. Blue litmus paper will only change color in the presence of an acid, at which point it will turn red.