Q36 of 270 Page 79

Do basic solutions also have H+ (aq) ions? If yes, then why are they basic?

Yes, basic solutions also have H+ ions. However, their concentration is less as compared to the OH– ions that makes the solution basic.

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34 Name two common antacids. 35 Separate the following into substances having pH values above and below 7. How do these influence litmus paper?

(i) Lemon juice


(ii) Solution of washing soda


(iii) Toothpaste


(iv) Vinegar


(v) Stomach juices

 36 When a solution becomes more acidic, does the pH get higher or lower? 37 Define an acid and a base. Give two examples of each.