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A 26.04 g mixture of zinc and sodium is reacted with a stoichiometric amount of sulfuric acid. The reaction mixture is then reacted with 199 mL of 2.51 M barium chloride to produce the maximum possible amount of barium sulfate. Determine the percent sodium by mass in the original mixture.

Answer :

sebassandin

Answer:

[tex]\%Na=88.2\%[/tex]

Explanation:

Hello there!

In this case, according to the given equation, it turns out possible to say that the reaction with barium chloride proceeds with sodium sulfate only, which means we can calculate the mass of sodium in the sample by using the following procedure:

[tex]H_2SO_4+2Na\rightarrow H_2+Na_2SO_4\\\\Na_2SO_4+BaCl_2\rightarrow 2NaCl+BaSO_4[/tex]

Whereas the mass of zinc is calculated as follows:

[tex]m_{Na}=0.199L*2.51\frac{molBaCl_2}{L}*\frac{1molNa_2SO_4}{1molBaCl_2}*\frac{2molNa}{1molNa_2SO_4} *\frac{23.0gNa}{1molZn}\\\\m_{Na}=23.0g[/tex]

Thus, the percent sodium by mass would be:

[tex]\%Na=\frac{23.0}{26.04g}*100\% \\\\\%Na=88.2\%[/tex]

Regards!

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