Question
Analyze these statements about a buffer solution:
(I) A buffer solution stabilizes pH levels when small amounts of acids or bases are introduced. (II) The pH of a neutral salt solution is consistently 7. (III) Acetic acid (CH₃COOH) is categorized as a strong acid, completely dissociating in water.Solution
Only statement (I) is correct; a buffer solution indeed stabilizes pH against minor additions of acid or base. Statement (II) is incorrect as the pH of a salt solution can vary based on the acid and base from which it is derived. Statement (III) is also incorrect, as acetic acid is a weak acid that does not fully dissociate in water.
What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exactvalue.)<...
(4.89)2 + √144.35 - √121.25 = ?
8.15 of 124.95 ÷ 40.13 + 249.84 X 14.18 - √325 X 149.87 = ? X 10.85
65.22 of 359.98% + 459.99 ÷ 23.18 = ?
118.95 – 24.10 + (91.90 ÷ 22.89 × 12.14) = ?
(17.17 × 21.98) + 34.15% of 649.99 = ? + 125.34
59.68% of √400 × 123.95 = ?
5275 of 105% + 99.07 × 17.889 =?
...A certain sum of money invested at R% p.a. fetches a compound interest (compounded annually) of 1620 and simple interest of Rs.1500 at the end of 2 year...
