Question

1. A 1.00 liter solution contains 0.40 M ammonia and 0.31 M ammonium nitrate.

If 0.15 moles of hydrobromic 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 hydrobromic acid.)

_______TrueFalse A. The number of moles of NH₃ will increase.

_______TrueFalse B. The number of moles of NH₄⁺ will decrease.

_______TrueFalse C. The equilibrium concentration of H₃O⁺ will remain the same.

_______TrueFalse D. The pH will remain the same.

_______TrueFalse E. The ratio of [NH₃] / [NH₄⁺] will decrease.

2. A 1.00 liter solution contains 0.52 moles hypochlorous acid and 0.40 moles potassium hypochlorite .

If 0.20 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.)

_______TrueFalseA. The number of moles of HClO will remain the same.

_______TrueFalseB. The number of moles of ClO^- will decrease.

_______TrueFalseC. The equilibrium concentration of H₃O⁺ will remain the same.

_______TrueFalseD. The pH will remain the same.

_______TrueFalseE. The ratio of [HClO] / [ClO^-] will remain the same.

Answer 1

Here is the solution of your question. If you have any doubt or need any clarification please comment in comment box and will definitely resolve your query. If you find useful please upvote it. Thanks in advance.

Given 0.40M NH3 and 0:31 M NHUNO3 On aedding HBr into the systen it reacts with NHz to form Gry & from the requation - POH= pkb + log NHU I NH3 [487] = 0.15 moies - 0:ism IL NH3 + HBO NHD &r I 0.40 un 0:15 031 C -0.15 -0.15 +045 +0.15 LE 0-2579 - 0.46M 0.5M - from above it is clear that [nomy] decreeses while [Nhut] increases as False Number of moles of NHz will decrease b) False Number of moles 4 Nity will increase False Hot get completely wed up during - the reaction. * False pH wir also get changed. here ratio of [Nhut increases Trie [NH 3 so ratio of NH37 w will decrease NUT reaction with HBT initid 0.40 ratio 0-31 | NH3 -0.40 INHE) 0.31 0.25 - D.46 NH3