What is purple kumquat? How to change color? Applications of purple litmus
1 What is purple litmus? Advantages of blue litmus compared to other PH indicators Purple litmus or litmus paper – paper impregnated with an ethanol solution or water with a colorant is isolated from the roots of lichens Roccella and Dendrographa . This paper was originally purple in color and was used in chemistry experiments and pH measurements. After use, litmus paper will change to another color. Fast results (usually used in experiments) are the biggest advantage of red litmus. Besides, litmus paper is also used to distinguish gases. Therefore, purple litmus is indispensable in current experiments or laboratories. 2 Classification of purple litmus Purple litmus paper is divided into two main types: red litmus paper and blue litmus paper. Red litmus paper : Made by treating plain paper and a dye soaked in a dilute solution of sulfuric acid . Next, they are brought to dry by direct contact with the air. Blue litmus paper: When blue litmus paper is dipped i...