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When placed in 1 L of water, which of the following combinations would give a buffer solution?1. 0.5 mol HClO and 0.5 mol NaClO2. 0.5 mol HBr and 0.5 mol NaF3. 0.5 mol HBr and 1.0 mol NaF4. 0.5 mol HBr and 1.0 mol NaOH

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joniyamurray

Answer:

3.8 g Fe * 1 mol Fe/55.85 g Fe (molar mass) = .0680 mol Fe

.0680 mol Fe * 2 mol HBr/1 mol Fe (found in formula Fe+2HBr=>FeBr2+H2)=.136 mol HBr

.136 mol HBr*80.912 g HBr/1 mol HBr=11.004 g HBr (or 11 using 2 sig figs)

And the mass of H2 that is produced is 0.14 g

Explanation:

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