Upon receipt of manganese hydroxide in the laboratory, an ammonia solution and a solution of manganese nitrate were used

Upon receipt of manganese hydroxide in the laboratory, an ammonia solution and a solution of manganese nitrate were used. The latter was prepared from a powder of manganese nitrate taken from two different bottles, in one of which the manganese salt was contaminated with an admixture of ammonium chloride. Is the same amount of manganese hydroxide precipitate formed when identical amounts of NH3 (aq) are added to samples of manganese nitrate solution prepared from different flasks

The ammonia solution has an alkaline environment as part of the ammonia molecules with water form the NH4 (+) and OH (-) ions, which can be represented by the scheme:
NH3 + H2O = NH4 (+) and OH (-). Thus, the NH4OH base is formed.
1. When mixing solutions of pure manganese nitrate with a solution of ammonia, a mixture of ions is first formed: Mn (2+), NO3 (-), NH4 (+) and OH (-), in which Mn (2+) and OH (- ) combine with each other with the formation of a weak electrolyte Mn (OH) 2 [one ion Mn (2+) combines with two OH ions (-)], and the remaining ions do not connect with each other. What can be represented by schemes:
Mn (NO3) 2 + 2NH4OH = Mn (OH) 2 (precip.) + 2NH4NO3 – (molecular form);
Mn (2+) + 2NO3 (-) + 2NH4 (+) + 2OH (-) = Mn (OH) 2 (precipitation) + 2NH4 (+) + 2NO3 (-) – (full ionic form);
Mn (2+) + 2OH (-) = Mn (OH) 2 (precip.) Is the abbreviated ionic form.
2. When mixing solutions of manganese nitrate contaminated with ammonium chloride with an ammonia solution, a mixture of ions is first formed: Mn (2+), NO3 (-), NH4 (+), Cl (-) and OH (-), in which Mn (2 +) and OH (-) combine with each other to form a weak electrolyte Mn (OH) 2 [one Mn (2+) ion combines with two OH (-) ions], and the remaining ions do not combine with each other. What can be represented by schemes:
Mn (NO3) 2 + NH4Cl + 2NH4OH = Mn (OH) 2 (precipit.) + 2NH4NO3 + NH4Cl – (molecular form);
Mn (2+) + 2NO3 (-) + 3NH4 (+) + Cl (-) + 2OH (-) = Mn (OH) 2 (precipitation) + 3NH4 (+) + 2NO3 (-) + Cl (-) – (full ionic form);
Mn (2+) + 2OH (-) = Mn (OH) 2 (precip.) – (reduced ionic form).

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