We’re being asked to determine whether HI can dissolve the given metal sample, write a balanced reaction, and the volume of 3.5 M HI required to completely dissolve the sample.
We’re going to dissolve metals meaning the metals will undergo oxidation. HI will break up in the solution:
• HI(aq) → H+(aq) + I-(aq)
▪ if we’re going to oxidize the metals, it means that something is also reduced in the solution
▪ I-(aq) → with negative charge and it is the most reduced form of I X
▪ H+(aq) → has a positive charge → can gain e- and can be reduced ü