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1 vote
He table below lists some acids and bases. Strong acids Weak acids Weak bases Strong bases HBr CH3COOH NH3 NaOH HNO3 HCOOH NH4OH KOH H2SO4 Ca(OH)2 Which salt has a pH < 7?

A) KBr
B) HCOOK
C) CaSO4
D) NH4NO3

2 Answers

6 votes

Answer : Option D)
NH_(4)NO_(3)

Explanation :

Amongst the given list of acids and bases, following are the strong acids and weak acids

Strong Acid: HBr,
HNO_(3) and
H_(2)SO_(4)

Weak Acid:
CH_(3)COOH and HCOOH

And strong bases with weak bases are given below;

Strong Base: NaOH, KOH and
Ca(OH)_(2)

Weak Base:
NH_(4)OH and
NH_(3)


Now, Acid + Base → Salt + Water

so, the salt of strong acid and weak base which will have pH < 7

will be
NH_(4)NO_(3)

because of the following acid base reaction (neutralization reaction)


HNO_(3) +
NH_(4)OH
NH_(4)NO_(3) +
H_(2)O

User Matias Rasmussen
by
8.4k points
5 votes
The answer is D)NH4NO3

User Netdjw
by
8.5k points

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