1) What is the -OH ion concentration in lemon juice having a pH of 2.4? a. 2.51E

Question

1) What is the -OH ion concentration in lemon juice having a pH of 2.4?

a. 2.51EE-12 M

b. 4.0EE-2 M

c. 250 M

d. 3.98EE-17 M

e. 4.0EE-3 M

f. 11.6 M

2) What is the pH of 0.183 M aqueous solution of hypobromous acid (HOBr), Given Ka for HOBr = 2.4 x 10-9 (or 2.4EE-9)

a. 4.72

b. 8.69

c. 3.97

d. 4.34

e. 9.28

3) Which one of the following indicators should be used in the titration of the analyte below

a. Methyl Violet (pKIn = 0.80)

b. Malachite Green (pKIn = 1.00)

c. Resorcin Blue (pKIn = 5.10)

d. Tumaric Curcumin (pKIn = 8.00)

e. No indicator is needed

Explanation / Answer

1) What is the -OH ion concentration in lemon juice having a pH of 2.4?

pOH = 14-pH = 14-2.4 = 11.6

[OH-] = 10^-pOH = 10^-11.6 = 2.5118*10^-12

choose A

NOTE: Please consider posting multiple questions in different set of Q&A. We are not allowed to answer to multiple questions in a single set of Q&A.

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.