1. An aqueous solution contains 0.26 M ammonium perchlorate . One liter of this
ID: 1045918 • Letter: 1
Question
1.
An aqueous solution contains 0.26 M ammonium perchlorate.
One liter of this solution could be converted into a buffer by the addition of:
(Assume that the volume remains constant as each substance is added.)
0.12 mol HNO3
0.12 mol KOH
0.25 mol NH3
0.26 mol HNO3
0.25 mol NaClO4
2.
An aqueous solution contains 0.33 M ammonia.
One liter of this solution could be converted into a buffer by the addition of:
(Assume that the volume remains constant as each substance is added.)
0.34 mol NH4Br
0.16 mol KOH
0.16 mol HCl
0.34 mol HCl
0.33 mol KBr
Explanation / Answer
1)
answers :
0.12 mol KOH
0.25 mol NH3
2)
answers:
0.34 mol NH4Br
0.16 mol HCl
explanation:
1)
NH4+ and NH3 can act as a buffer
NH4+ + OH- -------------------> NH4OH
0.26 0.12 0
0.14 0.0 0.12
here also NH4+ and NH4OH left so it is also buffer. similarly for question 2) also like this
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