OH JUl HSO and 9. Which one of these statements about strong acids is true? A) A
ID: 507405 • Letter: O
Question
OH JUl HSO and 9. Which one of these statements about strong acids is true? A) All strong acids have H toms bonded to electronegative oxygen atoms. Strong acids are 100% ionized in water. C) The conjugate base of a strong acid itself a strong base D) Strong acids are very concentrated acids. E) Strong acids produce solutions with a higher pH than weak acids. 10. What is the concentration of hydronium ion in a 2.5 M HCIO3 solution? B) 2.5 5.0 E) 7.5 M 11. Calculate the pH 3.5 x 10 M HNO3 solution. A) -2.46 B) 0.54 C 2.46 D) 3.46 E impossible to calculate without Ka 12. Which solution will have the lowest pH? A) 0.10 M HCN B) 0.10 M H2Co3 (C)0.10 M HNOs 10 M NaoH E) 0.10 M NaCl 13. Which one of salts will form a neutral solution on dissolving in water? these A) KCI B) KNO C) NaCN D) NH NO3 EO KF 14. Which one of these salts will form a basic solution on dissolving in water? 15. Phosphoric acid has three pKa values, pKa r 2.12; pKa 2 6.8; and 13-125 Which one of these pKa values would be most useful to solve for the pH of a solution of 0.30 M A) pKa B) pKa c) pKa, 3 D), none of these would be useful E) impossible to answer without further information. 16. 1.25 moles of Nocl were placed in a 2.50 L on chamber at 427 After equilibrium was reached, 1.10 moles of Nocl remained. Calculate the equilibrium constant, Kc, for reaction 2NOCI (g) -2NO(g A) 3.0 x 10 B) 1.8 x 103 1.4 x 10 D) 5.6 x 10 E) 4.1 x 10Explanation / Answer
9. B
Strong acids are almost completely ionised i.e 100% ionisation.
10. C
Concentration of hydronium ion=concentration of HClO3
11. C
We know that pH is defined as negative logarithm of hydronium ion concentration which in this case is equal to concentration of HNO3.
pH=-log3.45*10-3=2.46
12. C
Strongest acid have lowest pH
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.