Calculate the charge, in coulombs, passed during the electrolysis.

\(\left( {{\text{current }}I = \frac{{{\text{charge }}Q\,}}{{{\text{time }}t}}} \right)\)

Calculate the amount, in mol, of electrons passed using section 2 of the data booklet.

Calculate the mass of indium deposited by one mole of electrons.

Calculate the number of moles of electrons required to deposit one mole of indium. Relative atomic mass of indium, A_r=114.82.

Deduce the charge on the indium ion and the formula of indium sulfate.

«0.300A × 9.00 × 10³ s =» 2.70 × 10³ «C»

«mol e⁻ = \(\frac{{2700\,{\text{C}}}}{{96\,500\,{\text{C}}\,{\text{mo}}{{\text{l}}^{ - 1}}}}\) =» 2.80 × 10⁻² «mol»

«\(\frac{{1.07{\rm{g}}}}{{0.0280{\rm{mol}}}}\)=» 38.2 «g»

«\(\frac{{114.82\,{\text{g}}}}{{38.2\,{\text{g}}\,{\text{mo}}{{\text{l}}^{ - 1}}}}\) e⁻ =» 3.01/3.00 «mol e⁻»

In³⁺ /3+ AND In₂(SO₄)₃

Do not accept “+3/3”