What is the molar mass of the unknown metal cation? Clue: Is the precipitate in the second reaction a pure metal? 2. In the unknown solution, what is the identity of the metal?
Concentration is the only label of the unknown solution. It was analyzed and discovered that it is a“1.000 M X(NO3)2” and known to be a metal cation. To find out to identity of the cation, a 10.00 mL aliquot of the solution was reacted with 10.00 mL of 1.000 M NaOH solution and heated according to the reactions below:
(1st reaction) X(NO3)2 + 2 NaOH → A + 2 NaNO3
(2nd reaction) A + heat → B + H2O
From the solution in Products 2, it was filtered and heated further until it was dried. This produced a precipitate with 0.3592 g.
1. What is the molar mass of the unknown metal cation?
Clue: Is the precipitate in the second reaction a pure metal?
2. In the unknown solution, what is the identity of the metal?
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