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What colour will universal indicator sho...

What colour will universal indicator show if you add it to the following substnaces?
(a). Potassium hydroxide pH=12
(b). Soda water, pH=5
(c). Sulphuric acid, pH=2.

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(a). Dark purple
(b). Orange yellow
(c). Red
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(a). What would you expect the pH of pure water to be? (b). What colour would the universal indicator show in an aqueous solution of sugar? Why? (c). A sample of rain water turned universal indicator paper yellow. What would you expect its pH to be? Is it a strong or a weak acid?

(a). What effect does the concentration of H^(+) (aq) ions have on the nature of a solution? (b). What effect does the concentration of OH^(-) ions have on the nature of a solution? (c). Someone put some universal indicator paper into vinegar. The pH is 3. What does this tell you about the vinegar? (d). Someone put some universal indicator paper onto wet soap. the pH is 8. What does this tell you about the soap? (e). State whether a solution is acidic, alkali or neutral if its pH is: (i) 9 (ii) 4 (iii) 7 (iv) 1 (v) 10 (vi) 3.

Five solutions A,B,C,D and E when tested with universal indicator showed pH as 4,1,11,7 and 9, respectively. Which solution is (a) neutral? (b) strongly alkaline? (c) strongly acidic? (d) weakly acidic? (e) weakly alkaline? Arrange the pH in increasing order of hydrogen-ion concentration.

A beaker of concentrated hydrochloric acid has a pH of 1. What colour will full range universal indicator turn if it is added to this beaker? Is it a strong or a weak acid?

(a). What is a universal indicator? For what purrpose is it used? (b). How does a universal indicator work? (c). Water is a neutral substance. What colour will you get when you add a few drops of universal indicator to a test-tube containing water?

LAKHMIR SINGH & MANJIT KAUR-ACID, BASES AND SALTS-Exercise
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  3. What colour will universal indicator show if you add it to the followi...

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  4. A beaker of concentrated hydrochloric acid has a pH of 1. What colour ...

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  6. Two solutions A and B have pH values of 3.0 and 9.5 respectively. Whic...

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  9. Fill in the following blanks with suitable words (a). Acids have a p...

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  15. (a). Why is it wrong the treat a bee sting with vinergar? (b). Why i...

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  16. (a). What does the pH of a solution signify? Three solutions A, B and ...

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  18. (a). The pH of a cold drink is 5. What will be its action on blue and ...

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