Red
It can be green or blue.
hydrochloric acid usually has pH 1 which turns litmus Red
Universal indicator will turn red or pink in dilute hydrochloric acid.
Litmus paper will turn red in dilute hydrochloric acid, indicating that the solution is acidic.
Zinc chloride is a white crystalline solid when zinc reacts with hydrochloric acid.
The natural color of dilute hydrochloric acid is colorless. It is a clear liquid with no distinct color.
Universal indicator changes to red/orange when hydrochloric acid is added, indicating that the solution is acidic.
Hydrochloric acid will keep litmus red - it needs alkali to turn it blue
Red!
If it is adulterated a black colour will be formed :D
it turns red colour
what colour change occurs during the calcium and hydrochloric acid reaction