Which of the following solution have highest pH?
Correct answer: A. 0.2 M Ca(OH)2
- A. 0.2 M Ca(OH)2
- B. 0.1 M Na(OH)
- C. 0.1 M HCl
- D. 0.1 M CH3COOH
Explanation
The solution with the highest pH is the one that is most basic. Calcium hydroxide, Ca(OH)2, is a strong base and at 0.2 M concentration, it provides a significantly higher concentration of hydroxide ions compared to 0.1 M NaOH, which is also a strong base but at a lower concentration. Both HCl and CH3COOH are acids, with HCl being a strong acid resulting in a very low pH, and CH3COOH being a weak acid resulting in a higher pH than HCl but still much lower than that of the strong bases. Therefore, 0.2 M Ca(OH)2 has the highest pH among the given options.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Acids, Bases and Salts
Acid and base behaviour is explained through the Bronsted-Lowry transfer of protons and the Lewis donation or acceptance of electron pairs. The topic includes pH, pOH, ionisation and water equilibrium, plus salt formation and hydrolysis, where a salt solution may become acidic, basic or neutral.
Practise Acids, Bases and Salts
314 free Acids, Bases and Salts MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Acids, Bases and Salts questions
pH of an aqueous solution is 5.5 the hydroxyl ion conc. in the solution will be
0.1 M HCl has pH = 1.0, it is about 100 times stronger than nitric acid. Then pH of acetic acid will be
A piece of paper is burnt in air, the gas produced is passed through distilled water, the pH of water will be
Which of the solution among the following have highest pH?
What is the pOH of the solution if the pKa value of acid is 4.5 & the concentration of salt and acid is 0.1 molar & 0.001 molar respectively
Strong acids give leveling effect in