A coloured solution known to contain two metal ions

CHEMISTRY · Single correct · ICSE · Chemistry · Analytical Chemistry · Analytical Chemistry

Problem

A coloured solution known to contain two metal ions, was treated with excess cold sodium hydroxide solution. When filtered a whitish solid, slowly changing to brown, was retained on the filter paper and a colourless solution collected as the filtrate. Dropwise addition of hydrochloric acid to the filtrate produced a white ppt. which dissolved in excess acid. Treatment of the residue on filter paper with a solution of strong oxidiser produced a reddish-violet solution. Indicate any pairs of ions: (1)

\text{Zn}^{2+}

and

\text{Mn}^{2+}

ions (2)

\text{Mg}^{2+}

and

\text{Zn}^{2+}

ions (3)

\text{Mn}^{2+}

and

\text{Mg}^{2+}

ions (4)

\text{Fe}^{2+}

and

\text{Zn}^{2+}

ions

Related theory

Amphoteric metals with alkalis
Qualitative Analysis
Alkalis on metals and oxides

Browse the problem library