Can you help me with these two problems? They\'re both only true or false. dow H

Question

Can you help me with these two problems? They're both only true or false. dow Help ngagenow.com f Foods| Insoluble & Soluble Food C Cinemark Theatre Detail- Cinemark West andX Re Use the References to access important values if needed for A 1.00 liter solution contains 0.53 M ammonia and 0.41 M ammonium nitrate. If 0.2 moles of perchloric acid are added to this system, indicate whether the following statements are true or false. (Assume that the volume does not change upon the addition of perchloric acid.) A. The number of moles of NH will increase B. The number of moles of NH, will decrease. number of moles of NH4 will decrease C.The equilibrium concentration of H,o will decrease. D. The pH will decrease. E. The ratio of [NH3]/INH4 ] will remain the same Submit Answer Retry Entire Group 9 more group attempts remaining

Explanation / Answer

Part A : Initial pH,

pH = pKa + log(base/acid)

      = 9.26 + log(0.53/0.41)

      = 9.37

After 0.2 mol of perchloric acid is added

pH = 9.26 + log[(0.53 - 0.2)/1)/(0.41 + 0.2)/1)]

      = 8.99

So of the given statements the true statement would be,

D. The pH will decrease

Rest all, A, B, C and E. are false

Part B : Initial pH

pH = pKa + log(base/acid)

      = 9.2 + log(0.47/0.36)

      = 9.31

After 0.24 mol of KOH is added

pH = 9.2 + log[(0.47 + 0.24)/1)/(0.36 0.24)/1)]

      = 9.97

So of the given statements the true statement would be,

D. The pH will increase

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---