Which of the following represents chemical equilibrium on mixing?

CHEMISTRY · Single correct · AP · Chemistry · Acids and Bases · Acids and Bases

Problem

Which of the following represents chemical equilibrium on mixing? (1) 20 mL20\,\text{mL} of 0.1 M0.1\,\text{M} HCl +20 mL+20\,\text{mL} of 0.1 M0.1\,\text{M} NaOH (2) 20 mL20\,\text{mL} of 0.1 M0.1\,\text{M} NH4OH+20 mL\text{NH}_4\text{OH}+20\,\text{mL} of 0.1 M0.1\,\text{M} HCl (3) 20 mL20\,\text{mL} of 0.1 M0.1\,\text{M} AgNO3+20 mL\text{AgNO}_3+20\,\text{mL} of 0.1 M0.1\,\text{M} KCl (4) 20 mL20\,\text{mL} of 0.1 M0.1\,\text{M} K2CrO4+20 mL\text{K}_2\text{CrO}_4+20\,\text{mL} of 0.1 M0.1\,\text{M} Pb(NO3)2\text{Pb}(\text{NO}_3)_2

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