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.
Text Solution
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(a). (i). Neutral `D(pH=7)`, (ii). Strongly alkaline (CpH=11), (iii) strongly acidic B(pH=1), (iv). Weakly acidic: A(pH=4), (v). Weakly alkaline `E(pH=9)` (b). The solution having highest pH (11) will have the minimum hydrogen ion concentration whereas. The solution having the least pH(1) will have the maximum hydrogen ion concentration So, the given solutions can be arranged in the increasing order of their hydrogen ion concentration as hollows: `underset(("pH 11"))(C)" "underset(("pH 9"))(E)" "underset(("pH 7"))(D)" "underset(("pH 4"))(A)" "underset(("pH 1"))(B)` ltb rgt `underset("Increasing order of hydrogen concentration")overset("Decreasing order of pH")to`
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LAKHMIR SINGH & MANJIT KAUR-ACID, BASES AND SALTS-Questions Based on High Ordre Thinking skills (HOTS)
