two solutions X and y have pH values of 3 and 9 respectively which of these will turn litmus solution from Blue to Red and which will turn phenolphthalein from colourless to pink
Answers
Answer:
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Answer:
Solution X - pH value - 3
Solution Y - pH value - 9
Those substances that have pH value below 7 are acidic solutions.
Those substances that have pH value above 7 are basic solutions.
So,
→Solution X will turn blue litmus solution to red. [Acidic]
→ Solution Y will turn colourless phenolphthalein to pink. [Basic]
Knowledge Bytes:
→ pH scale
The pH scale has numbers from 0 to 14 that helps to determine whether a given substance is acidic, basic or neutral. Substances that lie between the scale 0-6 are acidic, those that have value 7 are neutral and those that lie between the scale 8-14 are basic.
→ Litmus
Litmus is a natural indicator that helps us to find whether a given substance is acidic or basic. An acidic substance turns blue litmus to red a basic substance turns red litmus to blue. Litmus is available as both paper and solution.
→ Phenolphthalein
Phenolphthalein is a colourless synthetic indicator that helps us to find whether a given substance is acidic or basic. A basic substance turns the colourless solution to pink and an acidic substance turns the pink solution back to colourless.