1- Calculate the concentration of each of the following solutions in mass percen

Question

1- Calculate the concentration of each of the following solutions in mass percent.

- 9.45g C2H6O in 68.1g H2O

- 112g KCl in 608g H2O

- 36.3mg KNO in 2.39 H2O

2- To what volume should you dilute 85mL of a 11.0M H2SO4 solution to obtain a 1.55M H2SO4 solution?

3- How much of a 5.4 M sucrose solution should be used to make 77.0 mL of a 0.050M solution?

4- Determine the volume of 0.22M KOHsolution required to neutralize each of the following samples of sulfuric acid. The neutralization reaction is:H2SO4(aq)+2KOH(aq)--->K2SO4(aq)+2H2O(l).

-20mL of 0.225M H2SO4

- 205mL of 0.155M H2SO4

- 50mL of 0.110M H2SO4

Explanation / Answer

Problem 1: H2SO4 is diprotic, so it gives [H+] of 2(0.255)M = 0.51M KOH is monobasic, so it gives [OH-] of 0.255M M1V1 = M2V2 0.51(45) = 0.255(V2) V2 = 90mL Problem 2: H2SO4 is diprotic, so it gives [H+] of 2(0.140)M = 0.28M KOH is monobasic, so it gives [OH-] of 0.255M M1V1 = M2V2 0.28(195) = 0.255(V2) V2 = 214.12mL Problem 3: H2SO4 is diprotic, so it gives [H+] of 2(0.110)M = 0.22M KOH is monobasic, so it gives [OH-] of 0.255M M1V1 = M2V2 0.22(70) = 0.255(V2) V2 = 60.39mL

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

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