chem help- moles?

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How many total moles of ions are released when the following sample dissolves completely in water?
26 g Ba(OH)2.8H2O

2007-02-05 17:30:00 · 1 answers · asked by socr8711 2 in Science & Mathematics ➔ Chemistry

1 answers

the molar mass of
Ba (OH)2 , 8H2O is = 137+2(1+16)+8(2+16) =315

26g = 26/315=0.0825moles

when Ba (OH) 2 dissociates we have 3 ions Ba and 2 (OH)-

so the number of ions is 0.0825*3 =0.2475

0.0825 of baryum and 0.165 of OH-

2007-02-05 17:45:18 · answer #1 · answered by maussy 7 · 0⤊ 0⤋