HomeQ&A• (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, alkaline or neutral if its pH is : (i) 9 (ii) 4 (iii) 7 (iv) 1 (v) 10 (vi) 3

• (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, alkaline or neutral if its pH is : (i) 9 (ii) 4 (iii) 7 (iv) 1 (v) 10 (vi) 3

ChemistryClass 10ICSEAnswered 27 Mar 2026

Answer

The solution becomes more acidic when the concentration of hydrogen ion increases
The solution become more basic as the concentration of hydroxide ion increases
If the pH is less than 7 it becomes acidic. Here the pH is 3 hence vinegar is acidic in nature
When universal indicator paper shows pH to be 8 then can be concluded that the substance or solution is basic in nature. Here soap is basic.
(i) pH = 9 :
- pH = 4 :
- pH = 7 :
- pH = 1 :
- pH = 10 :
- pH = 3 :

Chemistry · Class 10

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