Hello Chegg family i have a few titration and oxidation problems. Thank You! 1.)

Question

Hello Chegg family i have a few titration and oxidation problems. Thank You!

1.) What volume of a 0.367 M hydrochloric acid solution is required to neutralize 14.3 mL of a 0.177 M sodium hydroxide solution?
??mL hydrochloric acid

What volume of a 0.142 M barium hydroxide solution is required to neutralize 24.1 mL of a 0.154 M perchloric acid solution?
??mL barium hydroxide

2.) An aqueous solution of hydrochloric acid is standardized by titration with a 0.177 M solution of calcium hydroxide.
If 14.3 mL of base are required to neutralize 27.8 mL of the acid, what is the molarity of the hydrochloric acid solution?
??M hydrochloric acid

An aqueous solution of barium hydroxide is standardized by titration with a 0.142 M solution of perchloric acid.
If 24.1 mL of base are required to neutralize 13.6 mL of the acid, what is the molarity of the barium hydroxide solution?
??M barium hydroxide

3.) Potassium hydrogen phthalate is a solid, monoprotic acid frequently used in the laboratory as a primary standard. It has the unwieldy formula of KHC8H4O4. This is often written in shorthand notation as KHP.
If 37.5 mL of a sodium hydroxide solution are needed to neutralize 0.957 grams of KHP, what is the molarity of the sodium hydroxide solution?
??M

Oxalic acid dihydrate is a solid, diprotic acid that can be used in the laboratory as a primary standard. Its formula is H2C2O4•2H2O.
A student dissolves 0.348 grams of H2C2O4•2H2O in water and titrates the resulting solution with a solution of barium hydroxide of unknown concentration. If 21.4 mL of the barium hydroxide solution are required to neutralize the acid, what is the molarity of the barium hydroxide solution?
??M

4.) (a.)The concentration of H2C2O4 in a solution is determined by titrating it with a 0.1876 M permanganate solution. The balanced net ionic equation for the reaction is:

2MnO4-(aq) + 5H2C2O4(aq) + 6H3O+(aq) ---> 2Mn2+(aq) + 10CO2(g) + 14H2O(l)

In one experiment, 23.15 mL of the 0.1876 M permanganate solution is required to react completely with 20.00 mL of the H2C2O4 solution. Calculate the concentration of the H2C2O4 solution.

??M

(b.) A Ce4+ solution is standardized by titrating it with a 0.1069 M Sn2+ solution. The balanced net ionic equation for the reaction is:

2Ce4+(aq) + Sn2+(aq) ----> 2Ce3+(aq) + Sn4+(aq)

If 19.11 mL of the 0.1069 M Sn2+ solution is required to react completely with 40.00 mL of the Ce4+ solution, calculate the concentration of the Ce4+ solution.
??M

(c.) Suppose a solution of the reducing agent Fe2+ is titrated with a solution of the oxidizing agent Ce4+. The balanced net ionic equation for the reaction is:

Ce4+(aq) + Fe2+(aq) ---> Ce3+(aq) + Fe3+(aq)

What volume (in mL) of a 0.1338 M Ce4+ solution would be required to consume the Fe2+ in a 30.00 mL sample of a solution containing 7.640×10-2 M Fe2+?
??mL

Explanation / Answer

1) a) What volume of a 0.367 M hydrochloric acid solution is required to neutralize 14.3 mL of a 0.177M sodium hydroxide solution?
HCl + NaOH NaCl + H2O

HCl :

Molarity M1 = 0.367 M

Volume V1 = ? mL

moles n1 = 1

NaOH:

Molarity M2 = 0.177 M

Volume V2 = 14.3 mL

moles n2 = 1

At equivalence point,

    M1V1/n1 = M2V2/n2

V1 = (M2V2/n2) (n1/M1)

        = (0.177 M X 14.3 mL/ 1) ( 1/ 0.367)

= 6.9 mL

V1 ( volume of HCl required) = 6.9 mL

Therefore,

6.9 mL of  0.367 M hydrochloric acid solution is required to neutralize 14.3 mL of a 0.177M sodium hydroxide solution.

b) What volume of a 0.142 M barium hydroxide solution is required to neutralize 24.1 mL of a 0.154M perchloric acid solution?

Ba(OH)2 + 2HClO4 Ba(ClO4)2 + 2H2O

Ba(OH)2 :

Molarity M1 = 0.142 M

Volume V1 = ? mL

moles n1 = 1

HClO4:

Molarity M2 = 0.154 M

Volume V2 = 24.1 mL

moles n2 = 2

At equivalence point,

    M1V1/n1 = M2V2/n2

V1 = (M2V2/n2) (n1/M1)

        = (0.154 M X 24.1 mL/ 2) ( 1/ 0.142)

= 13.1 mL

V1 [ volume of Ba(OH)2 required ] = 13.1 mL

Therefore,

13.1 mL of  0.142 M barium hydroxide solution is required to neutralize 24.1 mL of a 0.154M perchloric acid solution.

Related Questions

Navigate

• Browse (All)
• Browse H
• Subjects

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