Question

Shaan performed a test to check acidic or basic strength of a food
item. He observes the color change as shown in the picture.

a. What can he conclude from the test about the nature of the food item?
b. How can you use pH color chart to determine the pH strength of the
substance?

Answer 1

a.  What can he conclude from the test about the nature of the food item?

Answer: As the red litmus paper turns blue, he can conclude from the  test that the nature of the food item is basic.

b.  How can you use pH colour chart to determine the pH strength of the substance?

Answer: The substance having pH of 0 are said to be strongly acidic and  substances with pH 14 are considered strongly basic. The substances with pH 7 are called neutral substances. Different acids have different  strengths and thus a different pH also. After the test for a substance  is done using pH paper, we can compare the colour of the pH paper  to the colour chart or scale to determine how acidic or basic the  substance is.

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