'X' is the number of acidic oxides among VO2, V2O3, CrO3, V2O5 and Mn2O7. The primary valency of cobalt in
[Co(H2NCH2CH2NH2)3]2(SO4)3 is Y. The value of X + Y is _________.
Solution
<p>In the given compounds, we evaluate which are acidic oxides:</p>
<p><p><strong>CrO<sub>3</sub></strong> is acidic.</p></p>
<p><p><strong>Mn<sub>2</sub>O<sub>7</sub></strong> is acidic.</p></p>
<p>Therefore, the number of acidic oxides, $ X $, is 2.</p>
<p>Next, for the complex $[Co(H<sub>2</sub>NCH<sub>2</sub>CH<sub>2</sub>NH<sub>2</sub>)<sub>3</sub>]<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub>$, we consider its dissociation:</p>
<p>$ {[\mathop {Co}\limits^{III} {({H_2}NC{H_2}C{H_2}N{H_2})_3}]_2}{(SO_4)_3} \rightleftharpoons 2{[\mathop {Co}\limits^{III} {({H_2}NC{H_2}C{H_2}N{H_2})_3}]^{3+}} + 3SO_4^{2-} $</p>
<p>The primary valency of cobalt (Y) in this context is 3.</p>
<p>Thus, the value of $ X + Y $ is:</p>
<p>$ X + Y = 2 + 3 = 5 $</p>
About this question
Subject: Chemistry · Chapter: Coordination Compounds · Topic: Ligands and Coordination Number
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