The preparations of two aqueous solutions are described in the table below. For

Question

The preparations of two aqueous solutions are described in the table below. For each solution, write the chemical formulas of the major species present at equillbrium. You can leave out water itself Write the chemical formulas of the species that will act as acids in the 'acids' row, the formulas of the species that will act as bases in the 'bases' row, and the formulas of the species that will act as neither acids nor bases in the 'other' row. You will find it useful to keep in mind that NH, is a weak base. O acids: 1.1 mol of HBr is added to 1?0 L of a 1.1 MNH3 solution. bases: other: 0.3 mol of HI is added to adds: 1.0 L of a solution that is 0.8 M in both NH3 and NH4Br beses: D other

Explanation / Answer

HBr ( acid) + NH3 ( base) <----> NH4Br ( major species) + H2O (l)

HI (acid) + NH3 (base) <----> NH4+ (aq) + H2O + I- (aq)

major species her is NH4+ , , since NH3 is converted t0 NH4+ by HI , hence we have more NH4+ than NH3

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