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7TH STANDARD SCIENCE CHAPTER 2. ACIDS AND BASES. INDICATORS. LECTURE 3

by Web School Academy on July 11, 2020 in Science

7TH STANDARD SCIENCE

CHAPTER 2. ACIDS AND BASES.

INDICATORS.

LECTURE 3

HI CHILDREN ...

IN THIS VIDEO YOU WILL LEARN ABOUT WHAT ARE INDICATORS.

WHAT ARE INDICATORS?

INDICATORS ARE THE SUBSTANCES WHICH CHANGE THEIR NATURAL COLOR WHEN THEY ARE REACTED WITH OTHER CHEMICAL SUBSTANCES LIKE ACIDS OR BASES.

THE CHANGE OF THE COLOR OF THE INDICATOR IS DIFFERENT FROM ACIDS TO BASES.

THE INDICATORS ARE TWO TYPES

NATURAL INDICATORS: THE INDICATORS WHICH ARE AVAILABLE IN NATURE ARE NATURAL INDICATORS. EXAMPLE: TURMERIC, PETALS OF HIBISCUS, MANGO LEAVES, BEET ROOT AND OLEANDER.
ARTIFICIAL INDICATORS: LITMUS PAPER, METHYL ORANGE, PHENOLPHTHOLEIN.

FOR MORE VIDEOS PLEASE WATCH THE ABOVE VIDEO.

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