8 Calculate the H ion concentration in lemon juice having a pli ot 24. 0× 102M 9

Question

8 Calculate the H ion concentration in lemon juice having a pli ot 24. 0× 102M 9. Identify the eonjugate acid ofHCO 0.38 M D)40-10M in the reaction A) HO B) HCO C) H CO 10. Which one of these statements about strong acids is true? A) All strong acids have H atoms bonded to electronegative oxygen atoms B) Strong acids are 100% ionized in water. C) The conjugate base of a strong acid is itself a strong base. D) Strong acids are very concentrated acids. 11. The equilibrium constant for the reaction is 3.6 at 25°C. If Ka for CH COOH is 1.8 x 10-,what is the acid dissociation constant for C&HsCOOH;? A) 5.0× 10-6 B) 6.5 x 10-5 C) 2.3 × 104 D) 8.3 x 10- 12. Calculate the pH of a 6.71 x 102 M NaOH (base) solution. A) 12.83 B) 2.17 C) 11.82 D) 6.71 13. Acid strength decreases in the series: strongest HSO4 > HF> HCN. Which of these species is the weakest conjugate base? A) HF B) SO42 C) F D) CN 14. For which type of titration will the pH be basic at the equivalence point? A) B) C) D) Strong acid vs. strong base. Strong acid vs. weak base. Weak acid vs. strong base. All of the above. 15. The pOH of a solution is 9.60. Calculate the hydrogen ion concentration in this solution. A) 2.5×10-10M C) 4.0 x 10M B) D) 6.0x 109 M 2.4 x 104 M -5 (NaCNO) and 1.0 mole of cyanic acid (HCNO) in enough water to make 1.0 liter of solution. [Ka(HCNO) 2.0x 10 16. Calculate the pH of a buffer solution prepared by dissolving 0.20 mole of sodium cyanate D) 4.4 B) 3.0 C) 3.7 17. The OH concentration in a 7.5 × 10-3 M Ca(OH)2 solution is -3 B) 1.5×102M

Explanation / Answer

pH = -log[H^+]

[H^+]=10^(-pH)

        =10^(-2.4)

       = 4.0*10^-3 M

So, the correct answer is option (D).

As per chegg guidelines, first question is answered.

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