Acid and Base Indicators
As described on the properties of acids and bases above, acid and base have unique properties. We can diferentiate between acid and base use indicatos. An acid-base indicators area compound that shows a color change when reacted withacid or base.
Natural Indicators
Various types of plants can be used as natural indicators. Plants including indicators will naturally show a color change in the solution acid or alkaline. Some examples of plants including natural indicators are saffron, rose, red cabbage, purple cabbage, and hibiscus flowers.
Turmeric extract will leave yellow bright in acidic solution and under alkaline conditions will give an orange color. Cabbage (cabbage) red containing a substance indicators, namely anthocyanin. This substance in red sour, green on weak base, and yellow on a strong base. Hibiscus flower extract will give a bright red color if dropped in acid solutions. When dropped in alkaline solution will be generated green color.
Synthetic Indicators
One type of synthetic indicators that are not in the form of a liquid solution litmus paper. There are two types of litmus paper, namely blue and red litmus litmus.Blue litmus paper turns red in acidic solutions. Red litmus paperwill be blue in alkaline solution.
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