Which of the following has highest pH ?
(a) M/4 KOH
(b) M/4 NaOH
(c) M/4 NH₄OH₄
(d) M/4 Ca(OH)₂
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Answer:
D. is answer to the question
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M/4 Ca(OH)2 has the highest value of pH among the four given solutions.
- pH of a solution is the quantitative measure of the acidity or basicity of a solution.
- A solution which is less acidic has a higher pH value than the solution which is more acidic.
- So, a solution containing higher concentration of hydroxyl ion will have a greater pH value.
- M/4 Ca(OH)2 has the highest concentration of hydroxyl ions, since it is a diacidic strong base, hence it has the highest pH value.
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